{"title":"Aquarium Heating \u0026 Temperature Control","description":"\u003cp\u003eShop aquarium heating and temperature-control equipment for tropical, freshwater and marine aquariums. Simply Fish stocks aquarium heaters, thermometers and accessories from trusted brands including Aqua One, Eheim and Chihiros.\u003c\/p\u003e","products":[{"product_id":"eheim-thermocontrol-heater","title":"Eheim Thermocontrol Heater","description":"\u003ch2\u003e\u003cspan\u003eEheim Thermocontrol Aquarium Heater – 50W, 100W, 150W, 200W \u0026amp; 300W\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eEheim Thermocontrol Heater\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a premium adjustable aquarium heater designed to provide accurate, stable temperature control in both \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efreshwater and marine aquariums\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Made in Germany and built from temperature and shock-resistant laboratory glass, the Thermocontrol range combines precise heating with dependable safety features for long-term aquarium use.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTemperature can be precisely adjusted from \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e18–34°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with temperature control accuracy of approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e±0.5°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and the ability to recalibrate by \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e±2°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e when required. An indicator light shows when the heater is actively heating, while Eheim's \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eThermo Safety Control\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e provides automatic dry-running protection.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAvailable in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e50W, 100W, 150W, 200W and 300W variants\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making it easy to select the correct Eheim heater for anything from smaller tropical aquariums through to large freshwater and marine systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eAvailable Sizes \u0026amp; Aquarium Recommendations\u003c\/span\u003e\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eRecommended Aquarium Size\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eHeater Length\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDiameter\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e50W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e25–60L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e243mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e36mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e100W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e100–150L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e319mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e36mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e150W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e200–300L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e345mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e36mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e200W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e300–400L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e406mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e36mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e300W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e600–1000L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e506mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e36mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eThese are Eheim's manufacturer-rated aquarium sizes and dimensions for the Thermocontrol range.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAdjustable Temperature:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Precisely set between \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e18–34°C\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAccurate Control:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Temperature regulation accuracy of approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e±0.5°C\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRecalibratable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Temperature setting can be adjusted by up to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e±2°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e if required\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFully Submersible:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Watertight construction allows complete submersion\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eThermo Safety Control:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Automatic dry-running shut-off for additional protection\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLaboratory Glass Construction:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Temperature and shock-resistant glass designed for aquarium use\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eEven Heat Distribution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Glass jacket increases the heating surface for consistent heat transfer\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHeating Indicator Light:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Clearly shows when the heater is operating\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFresh \u0026amp; Saltwater Suitable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Designed for both freshwater and marine aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSecure Mounting:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Includes a double suction cup holder\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eApprox. 170cm Power Cable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides flexibility when positioning the heater\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMade in Germany\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3-Year Manufacturer Warranty\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eChoosing the Right Eheim Thermocontrol Heater\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e50W – 25–60L\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eIdeal for smaller tropical and marine aquariums where reliable adjustable heating is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e100W – 100–150L\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eDesigned for medium-sized aquariums requiring greater heating capacity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e150W – 200–300L\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eSuitable for larger community, planted, cichlid and marine aquarium systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e200W – 300–400L\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA strong option for larger aquariums requiring consistent temperature control.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e300W – 600–1000L\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe largest option in this listing, designed for very large freshwater and marine aquarium systems.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003ePerfect For\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e✔ Tropical freshwater aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Planted aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Community fish tanks\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Cichlid aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Large display aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Marine and saltwater aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Aquariums requiring precise adjustable temperature control \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Heater Sizing Information\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe aquarium volumes above are \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eEheim's official recommendations\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Actual heating requirements can vary depending on room temperature, aquarium dimensions, desired water temperature, lid or open-top design, and surrounding environmental conditions.\u003c\/span\u003e\u003c\/p\u003e","brand":"Eheim","offers":[{"title":"50w","offer_id":67555948429389,"sku":null,"price":70.0,"currency_code":"NZD","in_stock":true},{"title":"100w","offer_id":67555948462157,"sku":null,"price":80.0,"currency_code":"NZD","in_stock":true},{"title":"150w","offer_id":67555948494925,"sku":null,"price":90.0,"currency_code":"NZD","in_stock":true},{"title":"200w","offer_id":67555948527693,"sku":null,"price":95.0,"currency_code":"NZD","in_stock":true},{"title":"300w","offer_id":67555948560461,"sku":null,"price":105.0,"currency_code":"NZD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/DA37.png?v=1704581360"},{"product_id":"eheim-suction-cup-x4","title":"Eheim Suction Cup x4","description":"\u003cp data-start=\"113\" data-end=\"271\"\u003eSecure your aquarium equipment properly with \u003cstrong data-start=\"158\" data-end=\"182\"\u003eEheim Suction Cup x4\u003c\/strong\u003e – genuine replacement suction cups designed for reliable hold and long-term performance.\u003c\/p\u003e\n\u003cp data-start=\"273\" data-end=\"553\"\u003eOver time, suction cups can harden, lose grip, or fail — risking loose heaters, intake pipes, spray bars, or airline tubing. These authentic Eheim replacements restore a firm, secure attachment to your aquarium glass, helping maintain correct equipment positioning and water flow.\u003c\/p\u003e\n\u003cp data-start=\"555\" data-end=\"644\"\u003ePerfect for replacing worn or ageing suction mounts on heaters and filtration components.\u003c\/p\u003e\n\u003ch3 data-start=\"651\" data-end=\"668\"\u003eKey Features:\u003c\/h3\u003e\n\u003cp data-start=\"670\" data-end=\"881\"\u003e✔ \u003cstrong data-start=\"672\" data-end=\"707\"\u003eGenuine Eheim Replacement Parts\u003c\/strong\u003e\u003cbr data-start=\"707\" data-end=\"710\"\u003e✔ \u003cstrong data-start=\"712\" data-end=\"738\"\u003eStrong \u0026amp; Reliable Hold\u003c\/strong\u003e\u003cbr data-start=\"738\" data-end=\"741\"\u003e✔ \u003cstrong data-start=\"743\" data-end=\"787\"\u003eHelps Secure Heaters \u0026amp; Filter Components\u003c\/strong\u003e\u003cbr data-start=\"787\" data-end=\"790\"\u003e✔ \u003cstrong data-start=\"792\" data-end=\"833\"\u003eRestores Proper Equipment Positioning\u003c\/strong\u003e\u003cbr data-start=\"833\" data-end=\"836\"\u003e✔ \u003cstrong data-start=\"838\" data-end=\"881\"\u003ePack of 4 – Great Value Replacement Set\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"888\" data-end=\"902\"\u003eIdeal For:\u003c\/h3\u003e\n\u003cul data-start=\"904\" data-end=\"998\"\u003e\n\u003cli data-start=\"904\" data-end=\"924\"\u003e\n\u003cp data-start=\"906\" data-end=\"924\"\u003eAquarium heaters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"925\" data-end=\"948\"\u003e\n\u003cp data-start=\"927\" data-end=\"948\"\u003eFilter intake pipes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"949\" data-end=\"963\"\u003e\n\u003cp data-start=\"951\" data-end=\"963\"\u003eSpray bars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"964\" data-end=\"998\"\u003e\n\u003cp data-start=\"966\" data-end=\"998\"\u003eAirline tubing and accessories\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1000\" data-end=\"1131\"\u003eReplacing worn suction cups is a simple but important part of aquarium maintenance — preventing equipment from shifting or falling.\u003c\/p\u003e\n\u003cp data-start=\"1133\" data-end=\"1226\"\u003eThe \u003cstrong data-start=\"1137\" data-end=\"1161\"\u003eEheim Suction Cup x4\u003c\/strong\u003e pack keeps your setup secure and operating exactly as it should.\u003c\/p\u003e","brand":"Eheim","offers":[{"title":"Default Title","offer_id":40342776447053,"sku":"","price":14.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/CB730.png?v=1704581534"},{"product_id":"aqua-one-glass-thermometer","title":"Aqua One Glass Thermometer","description":"\u003cp data-start=\"118\" data-end=\"392\"\u003eThe \u003cstrong data-start=\"122\" data-end=\"152\"\u003eAqua One Glass Thermometer\u003c\/strong\u003e is a simple, reliable way to monitor your aquarium’s water temperature accurately. Maintaining stable temperature is essential for fish health, immune function, and overall tank stability — and this classic glass thermometer makes it easy.\u003c\/p\u003e\n\u003cp data-start=\"394\" data-end=\"534\"\u003eDesigned for internal aquarium use, it attaches securely inside your tank and provides clear, easy-to-read temperature readings at a glance.\u003c\/p\u003e\n\u003ch3 data-start=\"541\" data-end=\"558\"\u003eKey Features:\u003c\/h3\u003e\n\u003cp data-start=\"560\" data-end=\"786\"\u003e✔ \u003cstrong data-start=\"562\" data-end=\"595\"\u003eAccurate Temperature Readings\u003c\/strong\u003e\u003cbr data-start=\"595\" data-end=\"598\"\u003e✔ \u003cstrong data-start=\"600\" data-end=\"629\"\u003eClear, Easy-to-Read Scale\u003c\/strong\u003e\u003cbr data-start=\"629\" data-end=\"632\"\u003e✔ \u003cstrong data-start=\"634\" data-end=\"658\"\u003eCompact Glass Design\u003c\/strong\u003e – Minimal visual impact inside the tank\u003cbr data-start=\"698\" data-end=\"701\"\u003e✔ \u003cstrong data-start=\"703\" data-end=\"749\"\u003eSuitable for Freshwater \u0026amp; Marine Aquariums\u003c\/strong\u003e\u003cbr data-start=\"749\" data-end=\"752\"\u003e✔ \u003cstrong data-start=\"754\" data-end=\"786\"\u003eSimple \u0026amp; Reliable Monitoring\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"793\" data-end=\"821\"\u003eWhy Temperature Matters:\u003c\/h3\u003e\n\u003cul data-start=\"823\" data-end=\"998\"\u003e\n\u003cli data-start=\"823\" data-end=\"859\"\u003e\n\u003cp data-start=\"825\" data-end=\"859\"\u003ePrevents fish stress and illness\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"860\" data-end=\"904\"\u003e\n\u003cp data-start=\"862\" data-end=\"904\"\u003eSupports proper metabolism and digestion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"905\" data-end=\"950\"\u003e\n\u003cp data-start=\"907\" data-end=\"950\"\u003eEnsures heaters are functioning correctly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"951\" data-end=\"998\"\u003e\n\u003cp data-start=\"953\" data-end=\"998\"\u003eCritical for breeding and sensitive species\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1000\" data-end=\"1158\"\u003eThe \u003cstrong data-start=\"1004\" data-end=\"1034\"\u003eAqua One Glass Thermometer\u003c\/strong\u003e is an essential piece of equipment for any aquarium setup — whether you're running a tropical, coldwater, or marine system.\u003c\/p\u003e","brand":"Aqua One","offers":[{"title":"Default Title","offer_id":40980345389133,"sku":"","price":5.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/10306.jpg?v=1715997832"},{"product_id":"eheim-thermopreset-heater","title":"Eheim Thermopreset Heater","description":"\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eEheim Thermopreset Heater\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a compact, easy-to-use aquarium heater designed to maintain a constant \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e25°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e without the need for manual temperature adjustment. Its electronically controlled heating system provides accurate temperature regulation and even heat distribution, making it an excellent plug-and-play option for tropical freshwater and marine aquariums.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike the adjustable Eheim Thermocontrol range, the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eThermopreset is factory set to 25°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making it especially convenient for aquariums where a standard tropical temperature is required. A protective plastic guard surrounds the heater for additional durability, while an LED indicator shows when the heater is actively operating. Eheim also includes automatic dry-running protection for added safety.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eAvailable Sizes \u0026amp; Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eEheim Recommended Aquarium Size\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eHeater Length\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDiameter\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e50W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e25–60L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e168.5mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e28.2mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e100W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e100–150L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e183.5mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e28.2mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e150W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e200–300L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e223.5mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e28.2mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e200W\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e300–400L\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e253.5mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e28.2mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eThese are Eheim's official heater ratings and dimensions for the Thermopreset range.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFactory Preset to 25°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – No manual temperature adjustment required\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eElectronic Temperature Control\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Maintains a stable and accurate aquarium temperature\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFour Wattages Available\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – 50W, 100W, 150W and 200W\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eCompact Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Slim \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e28.2mm diameter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e keeps the heater unobtrusive inside the aquarium\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eProtective Plastic Guard\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Provides additional mechanical protection around the heater\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eEven Heat Distribution\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Efficient heating element distributes warmth throughout the aquarium\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLED Heating Indicator\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Shows when the heater is actively heating\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDry-Run Protection\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Helps protect the heater if it is accidentally operated outside the water\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFully Submersible\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed for installation inside the aquarium\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSecure Suction Cup Mounting\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Keeps the heater securely positioned\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFreshwater \u0026amp; Marine Suitable\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Suitable for tropical freshwater and saltwater aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3-Year Eheim Manufacturer Warranty\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eThermopreset vs Thermocontrol\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eThermopreset\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is designed for aquarists wanting a simple, fixed-temperature heater.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eThermopreset:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Factory set to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e25°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – plug in and let the heater automatically maintain the temperature\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eThermocontrol:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Adjustable temperature – better suited when you need to select a specific temperature for your fish \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003ePerfect For\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e✔ Tropical freshwater aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Community fish tanks\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Planted aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Cichlid aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Marine and saltwater aquariums\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Aquariums maintained around \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e25°C\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e✔ Aquarists wanting simple plug-and-play heating\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e✔ Setups where adjustable temperature control isn't required \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Heater Sizing Information\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe aquarium sizes listed are \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eEheim's official recommendations\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Heater requirements can also depend on room temperature, desired aquarium temperature, aquarium dimensions and whether the tank is covered or open-top. \u003c\/span\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Eheim","offers":[{"title":"50w","offer_id":67556114432077,"sku":null,"price":55.0,"currency_code":"NZD","in_stock":false},{"title":"100w","offer_id":67556114464845,"sku":null,"price":66.99,"currency_code":"NZD","in_stock":true},{"title":"150w","offer_id":67556114497613,"sku":null,"price":73.99,"currency_code":"NZD","in_stock":true},{"title":"200w","offer_id":67556114530381,"sku":null,"price":79.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/DA44.png?v=1717664028"},{"product_id":"aqua-one-heater-protector","title":"Aqua One Heater Protector","description":"\u003cp data-start=\"98\" data-end=\"302\"\u003eProtect your fish and your equipment with the \u003cstrong data-start=\"144\" data-end=\"173\"\u003eAqua One Heater Protector\u003c\/strong\u003e — a practical safety guard designed to shield aquarium heaters from accidental damage and prevent direct contact with livestock.\u003c\/p\u003e\n\u003cp data-start=\"304\" data-end=\"561\"\u003eHeaters can become extremely hot during operation. This protective cover reduces the risk of fish coming into direct contact with the heating element while also helping prevent heater breakage caused by décor, rocks, or accidental knocks during maintenance.\u003c\/p\u003e\n\u003cp data-start=\"563\" data-end=\"690\"\u003eIdeal for community tanks and larger active species, this simple addition adds an extra layer of safety to your aquarium setup.\u003c\/p\u003e\n\u003ch3 data-start=\"697\" data-end=\"714\"\u003eKey Features:\u003c\/h3\u003e\n\u003cp data-start=\"716\" data-end=\"949\"\u003e✔ \u003cstrong data-start=\"718\" data-end=\"762\"\u003eProtects Fish from Direct Heater Contact\u003c\/strong\u003e\u003cbr data-start=\"762\" data-end=\"765\"\u003e✔ \u003cstrong data-start=\"767\" data-end=\"800\"\u003eHelps Prevent Heater Breakage\u003c\/strong\u003e\u003cbr data-start=\"800\" data-end=\"803\"\u003e✔ \u003cstrong data-start=\"805\" data-end=\"834\"\u003eDurable Protective Design\u003c\/strong\u003e\u003cbr data-start=\"834\" data-end=\"837\"\u003e✔ \u003cstrong data-start=\"839\" data-end=\"858\"\u003eEasy to Install\u003c\/strong\u003e – Fits over most standard glass heaters\u003cbr data-start=\"898\" data-end=\"901\"\u003e✔ \u003cstrong data-start=\"903\" data-end=\"949\"\u003eSuitable for Freshwater \u0026amp; Marine Aquariums\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"956\" data-end=\"972\"\u003ePerfect For:\u003c\/h3\u003e\n\u003cul data-start=\"974\" data-end=\"1126\"\u003e\n\u003cli data-start=\"974\" data-end=\"997\"\u003e\n\u003cp data-start=\"976\" data-end=\"997\"\u003eCommunity aquariums\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"998\" data-end=\"1039\"\u003e\n\u003cp data-start=\"1000\" data-end=\"1039\"\u003eTanks with active or territorial fish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1040\" data-end=\"1082\"\u003e\n\u003cp data-start=\"1042\" data-end=\"1082\"\u003eAquariums with heavy décor or rockwork\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1083\" data-end=\"1126\"\u003e\n\u003cp data-start=\"1085\" data-end=\"1126\"\u003eAdded safety during routine maintenance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1128\" data-end=\"1258\"\u003eThe \u003cstrong data-start=\"1132\" data-end=\"1161\"\u003eAqua One Heater Protector\u003c\/strong\u003e is a low-cost upgrade that can prevent costly heater damage and improve overall aquarium safety.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Aqua One","offers":[{"title":"Default Title","offer_id":41181177249869,"sku":"","price":11.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/10298.jpg?v=1720515382"},{"product_id":"aqua-one-glass-heater","title":"Aqua One Glass Heater","description":"\u003ch2\u003eAqua One Glass Aquarium Heater\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAqua One Glass Heater\u003c\/strong\u003e is an adjustable, fully submersible aquarium heater designed to maintain a stable water temperature in tropical freshwater and marine aquariums.\u003c\/p\u003e\n\u003cp\u003eAvailable from \u003cstrong\u003e25W through to 300W\u003c\/strong\u003e, there is a model for everything from small tropical aquariums through to larger display tanks.\u003c\/p\u003e\n\u003cp\u003eThe adjustable thermostat allows you to select a temperature between approximately \u003cstrong\u003e20°C and 34°C\u003c\/strong\u003e, while the indicator light shows when the heater is actively heating the aquarium.\u003c\/p\u003e\n\u003ch3\u003eWhy Use an Aquarium Heater?\u003c\/h3\u003e\n\u003cp\u003eMost tropical aquarium fish require water that is warmer and more stable than normal room temperature.\u003c\/p\u003e\n\u003cp\u003eAn aquarium heater helps maintain that temperature automatically.\u003c\/p\u003e\n\u003cp\u003eOnce you've selected your desired temperature, the thermostat switches the heating element on and off as required rather than continuously heating the aquarium.\u003c\/p\u003e\n\u003cp\u003eA stable temperature is particularly important because sudden temperature swings can stress aquarium livestock.\u003c\/p\u003e\n\u003ch3\u003eWho Is It For?\u003c\/h3\u003e\n\u003cp\u003eWe recommend the Aqua One Glass Heater for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTropical freshwater aquariums\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCommunity fish tanks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlanted aquariums\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBetta aquariums\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCichlid tanks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMarine aquariums\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustomers wanting a straightforward adjustable heater\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAnyone replacing a basic or failed aquarium heater\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt is \u003cstrong\u003enot normally required for genuine coldwater setups\u003c\/strong\u003e unless the room temperature is dropping below the suitable range for the livestock being kept.\u003c\/p\u003e\n\u003ch3\u003eWhich Heater Size Should I Buy?\u003c\/h3\u003e\n\u003cp\u003eChoosing the correct wattage is one of the most important parts of buying an aquarium heater.\u003c\/p\u003e\n\u003cp\u003eAs a general guide for the Aqua One Glass Heater range:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e25W\u003c\/strong\u003e\u003cbr\u003eFor aquariums up to approximately \u003cstrong\u003e25L\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e55W\u003c\/strong\u003e\u003cbr\u003eFor aquariums up to approximately \u003cstrong\u003e55L\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e100W\u003c\/strong\u003e\u003cbr\u003eFor aquariums up to approximately \u003cstrong\u003e100L\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e150W\u003c\/strong\u003e\u003cbr\u003eFor aquariums up to approximately \u003cstrong\u003e150L\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e200W\u003c\/strong\u003e\u003cbr\u003eFor aquariums up to approximately \u003cstrong\u003e200L\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e300W\u003c\/strong\u003e\u003cbr\u003eFor aquariums up to approximately \u003cstrong\u003e300L\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese are useful manufacturer guidelines, but don't treat the litre rating as the only factor.\u003c\/p\u003e\n\u003cp\u003eThe heater also has to overcome the difference between your \u003cstrong\u003eroom temperature and desired aquarium temperature\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eFor example, keeping a tank at 25°C in a warm room is easier than maintaining 25°C in a cold Christchurch garage or poorly heated room during winter.\u003c\/p\u003e\n\u003cp\u003eIf you're right on the limit between two heater sizes, we'd generally lean toward the larger option rather than asking a small heater to run constantly.\u003c\/p\u003e\n\u003ch3\u003eHeater Size Guide\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAquarium Size\u003c\/th\u003e\n\u003cth\u003eHeater We'd Usually Start With\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUp to 25L\u003c\/td\u003e\n\u003ctd\u003e25W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25–55L\u003c\/td\u003e\n\u003ctd\u003e55W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55–100L\u003c\/td\u003e\n\u003ctd\u003e100W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100–150L\u003c\/td\u003e\n\u003ctd\u003e150W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e150–200L\u003c\/td\u003e\n\u003ctd\u003e200W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e200–300L\u003c\/td\u003e\n\u003ctd\u003e300W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor tanks larger than this, or aquariums sitting in particularly cold environments, you may be better using a higher-capacity heating solution or multiple heaters.\u003c\/p\u003e\n\u003ch3\u003eWhat Temperature Should I Set It To?\u003c\/h3\u003e\n\u003cp\u003eThat depends on the fish you keep.\u003c\/p\u003e\n\u003cp\u003eFor many standard tropical community aquariums, somewhere around \u003cstrong\u003e24–26°C\u003c\/strong\u003e is common.\u003c\/p\u003e\n\u003cp\u003eHowever, don't simply set every aquarium to 25°C because it's a tropical tank.\u003c\/p\u003e\n\u003cp\u003eDifferent species have different preferred temperature ranges.\u003c\/p\u003e\n\u003cp\u003eFor example, some tropical fish prefer cooler water while Discus and certain other species are generally kept considerably warmer.\u003c\/p\u003e\n\u003cp\u003eAlways choose the temperature based on your actual livestock.\u003c\/p\u003e\n\u003ch3\u003eAlways Use a Separate Thermometer\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDon't rely entirely on the number printed on the heater dial.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe strongly recommend using a separate aquarium thermometer so you can see the actual water temperature.\u003c\/p\u003e\n\u003cp\u003eThe heater thermostat controls the heater, but your thermometer tells you what's genuinely happening inside the tank.\u003c\/p\u003e\n\u003cp\u003eAfter installing or adjusting a heater, check the aquarium temperature over the following day rather than assuming the dial is perfectly calibrated.\u003c\/p\u003e\n\u003ch3\u003eWhere Should I Put the Heater?\u003c\/h3\u003e\n\u003cp\u003ePlace the heater somewhere with \u003cstrong\u003egood water circulation\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eNear the filter outlet or another area of consistent water movement is usually ideal because heated water is then distributed throughout the aquarium rather than creating one particularly warm area.\u003c\/p\u003e\n\u003cp\u003eMake sure the heater remains properly submerged according to the manufacturer's instructions.\u003c\/p\u003e\n\u003cp\u003eAvoid positioning it where rocks or heavy décor can fall against the glass.\u003c\/p\u003e\n\u003ch3\u003eHow Do I Set It Up?\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003eCheck the heater for any cracks or damage before installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAttach the suction cups securely.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePosition the heater somewhere with good water circulation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMake sure it is correctly submerged.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSet the thermostat to the temperature required by your livestock.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAllow the heater to sit in the aquarium water before operating it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlug the heater in.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCheck the actual water temperature with a separate thermometer.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMake small adjustments if required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eOnce installed, check the temperature regularly rather than assuming the heater will never require attention.\u003c\/p\u003e\n\u003ch3\u003eImportant Heater Safety\u003c\/h3\u003e\n\u003cp\u003eAquarium heaters combine \u003cstrong\u003eelectricity, glass and water\u003c\/strong\u003e, so treat them properly.\u003c\/p\u003e\n\u003cp\u003eA few rules we'd strongly recommend:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eNever operate the heater out of water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKeep the heater properly submerged.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUnplug the heater before draining water during aquarium maintenance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNever expose a hot heater to air or cold replacement water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIf removing the heater, switch it off and allow it time to cool first.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo not use a heater if the glass is cracked or moisture appears inside it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse a drip loop in the electrical cable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKeep heavy rocks and décor away from the heater.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAqua One recommends allowing approximately \u003cstrong\u003e10–15 minutes for the heater to cool before removing it from the aquarium\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eA Very Common Water-Change Mistake\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTurn your heater off before doing a water change.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is one we see more often than we'd like.\u003c\/p\u003e\n\u003cp\u003eIf the water level drops and leaves part of a glass heater exposed while it is still operating, the heater can become extremely hot.\u003c\/p\u003e\n\u003cp\u003eThen when cold replacement water hits the hot glass, you dramatically increase the chance of damaging the heater.\u003c\/p\u003e\n\u003cp\u003eOur routine is simple:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter off. Heater off. Water change. Refill the aquarium. Then turn everything back on once the equipment is properly submerged again.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eShould I Use a Heater Protector?\u003c\/h3\u003e\n\u003cp\u003eFor many standard community aquariums, it isn't compulsory.\u003c\/p\u003e\n\u003cp\u003eHowever, a heater guard can be worthwhile in aquariums containing:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLarge fish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBoisterous cichlids\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTurtles or other suitable aquatic animals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeavy rockwork\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFish likely to rest against equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSituations where the heater could easily be knocked\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA heater protector helps reduce direct contact with the heater and can also provide some physical protection for the glass.\u003c\/p\u003e\n\u003ch3\u003eOne Large Heater or Two Smaller Heaters?\u003c\/h3\u003e\n\u003cp\u003eFor a normal small or medium aquarium, one appropriately sized heater is usually perfectly practical.\u003c\/p\u003e\n\u003cp\u003eFor very large or valuable aquariums, some aquarists prefer using \u003cstrong\u003etwo smaller heaters\u003c\/strong\u003e rather than relying entirely on one large heater.\u003c\/p\u003e\n\u003cp\u003eFor example, instead of one very large heater, two units can be positioned at different ends of the aquarium.\u003c\/p\u003e\n\u003cp\u003eThis can:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eImprove heat distribution\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProvide some redundancy if one heater stops working\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReduce reliance on a single heating element\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt isn't essential for every aquarium, but it's something we'd consider on larger systems.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Aqua One\u003cbr\u003e\u003cstrong\u003eProduct:\u003c\/strong\u003e Glass Aquarium Heater\u003cbr\u003e\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e Approximately 20–34°C\u003cbr\u003e\u003cstrong\u003eDesign:\u003c\/strong\u003e Fully submersible glass heater\u003cbr\u003e\u003cstrong\u003eThermostat:\u003c\/strong\u003e Adjustable\u003cbr\u003e\u003cstrong\u003eHeating Indicator:\u003c\/strong\u003e Yes\u003cbr\u003e\u003cstrong\u003eSuitable For:\u003c\/strong\u003e Tropical freshwater and marine aquariums\u003c\/p\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e25W – 18.5cm\u003c\/strong\u003e\u003cbr\u003eRecommended aquarium volume: up to approximately 25L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e55W – 20.5cm\u003c\/strong\u003e\u003cbr\u003eRecommended aquarium volume: up to approximately 55L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e100W – 24.5cm\u003c\/strong\u003e\u003cbr\u003eRecommended aquarium volume: up to approximately 100L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e150W – 24.5cm\u003c\/strong\u003e\u003cbr\u003eRecommended aquarium volume: up to approximately 150L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e200W – approximately 30cm\u003c\/strong\u003e\u003cbr\u003eRecommended aquarium volume: up to approximately 200L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e300W – 35.5cm\u003c\/strong\u003e\u003cbr\u003eRecommended aquarium volume: up to approximately 300L\u003c\/p\u003e\n\u003ch3\u003eSimply Fish Recommends\u003c\/h3\u003e\n\u003cp\u003eFor a straightforward tropical aquarium, \u003cstrong\u003ethe Aqua One Glass Heater is one of those products that doesn't need to be complicated\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eChoose the appropriate wattage, put it somewhere with decent flow, set the correct temperature for your fish and verify that temperature with a separate thermometer.\u003c\/p\u003e\n\u003cp\u003eThe two mistakes we'd most like customers to avoid are:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1. Buying a heater that's too small.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf you've got a 100L aquarium sitting in a cold room, don't expect a tiny heater designed for a nano tank to keep up.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Forgetting to turn the heater off during water changes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA glass heater sitting half out of the water while it's powered on is asking for trouble.\u003c\/p\u003e\n\u003cp\u003eIf your aquarium sits right on the limit between two heater sizes — particularly in a cold Christchurch home over winter — we'd normally lean toward the larger model rather than making the smaller heater work flat out.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat wattage aquarium heater do I need?\u003c\/strong\u003e\u003cbr\u003eAqua One's range broadly matches heater wattage to aquarium volume: 25W for up to 25L, 55W for up to 55L, 100W for up to 100L, 150W for up to 150L, 200W for up to 200L and 300W for up to 300L.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperature should I set my aquarium heater to?\u003c\/strong\u003e\u003cbr\u003eThat depends on the species you keep. Many tropical community aquariums operate around 24–26°C, but always check the requirements of your actual fish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I fully submerge the Aqua One Glass Heater?\u003c\/strong\u003e\u003cbr\u003eYes. The Aqua One Glass Heater is designed to be fully submersible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the heater turn itself off?\u003c\/strong\u003e\u003cbr\u003eYes. The thermostat cycles the heating element on and off as required to maintain the selected temperature.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the light on my heater switching on and off?\u003c\/strong\u003e\u003cbr\u003eThat's normal. The indicator shows when the heating element is operating. Once the thermostat reaches the required temperature, the heater switches off until more heat is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I still need a thermometer?\u003c\/strong\u003e\u003cbr\u003eYes. We strongly recommend one. A separate thermometer lets you verify the actual aquarium temperature rather than relying solely on the heater dial.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere should I place the heater?\u003c\/strong\u003e\u003cbr\u003ePut it somewhere with good water movement, such as near the filter outlet, so heat is distributed throughout the aquarium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould I turn my heater off during a water change?\u003c\/strong\u003e\u003cbr\u003eYes. Turn it off before lowering the water level and don't switch it back on until the aquarium has been refilled and the heater is properly submerged.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long should I wait before removing a heater?\u003c\/strong\u003e\u003cbr\u003eAqua One recommends switching it off and allowing approximately 10–15 minutes for it to cool before removing it from the aquarium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use an Aqua One Glass Heater in a marine tank?\u003c\/strong\u003e\u003cbr\u003eYes. Aqua One lists the range as suitable for tropical freshwater and marine aquariums.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould I buy a bigger heater than my aquarium needs?\u003c\/strong\u003e\u003cbr\u003eDon't massively oversize it unnecessarily, but if you're right on the boundary between sizes or the aquarium is kept in a particularly cold room, we'd usually favour the next appropriate size rather than undersizing the heater.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Aqua One","offers":[{"title":"25W (18.5cm)","offer_id":43127072849997,"sku":null,"price":28.99,"currency_code":"NZD","in_stock":true},{"title":"55W (20.5cm)","offer_id":43127072882765,"sku":null,"price":29.99,"currency_code":"NZD","in_stock":true},{"title":"100W (24.5cm)","offer_id":43127072915533,"sku":null,"price":34.95,"currency_code":"NZD","in_stock":true},{"title":"150W (24.5cm)","offer_id":43127072948301,"sku":null,"price":39.0,"currency_code":"NZD","in_stock":true},{"title":"200W (30cm)","offer_id":43127072981069,"sku":null,"price":42.95,"currency_code":"NZD","in_stock":true},{"title":"300W (35.5cm)","offer_id":43127073013837,"sku":null,"price":44.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/11301.jpg?v=1720515382"},{"product_id":"aqua-one-suction-cup-glass-heaters-2pk","title":"Aqua One Suction Cup - Glass Heaters (2pk)","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eThe \u003cstrong\u003eAqua One Suction Cups – Glass Heaters (2 Pack)\u003c\/strong\u003e are genuine Aqua One replacement suction cups designed to securely hold compatible aquarium heaters and filter components in position. Ideal for replacing suction cups that have become worn, hardened, or lost their grip over time, they provide a simple way to restore secure mounting inside your aquarium.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThese replacement suction cups are compatible with the full range of \u003cstrong\u003eAqua One Glass Heaters from 25W through to 300W\u003c\/strong\u003e, as well as selected components on \u003cstrong\u003eAqua One Aquis 2200–2400 Canister Filters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003cbr\u003e✔ 2 × Aqua One replacement suction cups\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible With\u003c\/strong\u003e\u003cbr\u003e✔ Aqua One Glass Heater 25W\u003cbr\u003e✔ Aqua One Glass Heater 55W\u003cbr\u003e✔ Aqua One Glass Heater 100W\u003cbr\u003e✔ Aqua One Glass Heater 150W\u003cbr\u003e✔ Aqua One Glass Heater 200W\u003cbr\u003e✔ Aqua One Glass Heater 300W\u003cbr\u003e✔ Aqua One Aquis Canister Filters 2200–2400\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003cbr\u003e✔ Genuine Aqua One replacement part\u003cbr\u003e✔ Includes 2 suction cups\u003cbr\u003e✔ Securely attaches compatible equipment to aquarium glass\u003cbr\u003e✔ Ideal for replacing worn or damaged suction cups\u003cbr\u003e✔ Helps keep heaters securely positioned\u003cbr\u003e✔ Simple push-fit replacement\u003cbr\u003e✔ Durable and reusable design\u003cbr\u003e✔ Suitable for freshwater and marine aquariums\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003cbr\u003e✔ Aqua One Glass Heaters\u003cbr\u003e✔ Aqua One Aquis 2200–2400 Canister Filters\u003cbr\u003e✔ Replacing suction cups that no longer grip securely\u003cbr\u003e✔ Aquarium maintenance and spare parts\u003c\/p\u003e","brand":"Aqua One","offers":[{"title":"Default Title","offer_id":41235364315213,"sku":"","price":5.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/45112.jpg?v=1722143264"},{"product_id":"marina-thermo-digital-thermometer-with-memory","title":"Marina Thermo Digital Thermometer With Memory","description":"\u003cdiv class=\"relative nt-padding-10 nt-text-dark\" id=\"Description\"\u003e\n\u003cdiv class=\"nt-relative\"\u003e\n\u003cdiv id=\"content17252\" class=\"content\"\u003eThe Marina Thermo Digital Thermometer with Memory provides accurate water temperature readings for aquariums, featuring an easy-to-read digital display and memory function to track temperature highs and lows.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!----\u003e","brand":"Simply Fish","offers":[{"title":"Default Title","offer_id":41260786516045,"sku":"","price":39.99,"currency_code":"NZD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/Marina-Thermo-Digital-Thermometer-With-Memory-_11196.png?v=1723537407"},{"product_id":"aqua-one-external-thermometer","title":"Aqua One External Thermometer","description":"\u003cp data-start=\"169\" data-end=\"504\"\u003eKeep a close eye on your aquarium's temperature with the Aqua One External Thermometer - a reliable and easy-to-read solution for any freshwater or marine setup. Designed to stick directly to the outside of the glass, this thermometer gives accurate readings without needing to submerge anything in your tank.\u003c\/p\u003e\n\u003cp data-start=\"506\" data-end=\"772\"\u003eIts slim profile and clear digital display make it ideal for both beginner and experienced aquarists. Whether you’re managing sensitive species or just want peace of mind, the Aqua One External Thermometer helps you maintain stable, healthy conditions for your fish.\u003c\/p\u003e\n\u003cul data-start=\"774\" data-end=\"922\"\u003e\n\u003cli data-start=\"774\" data-end=\"809\"\u003e\n\u003cp data-start=\"776\" data-end=\"809\"\u003eAccurate temperature monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"810\" data-end=\"834\"\u003e\n\u003cp data-start=\"812\" data-end=\"834\"\u003eEasy-to-read display\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"835\" data-end=\"864\"\u003e\n\u003cp data-start=\"837\" data-end=\"864\"\u003eNo water contact required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"865\" data-end=\"893\"\u003e\n\u003cp data-start=\"867\" data-end=\"893\"\u003eSlim and discreet design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"894\" data-end=\"922\"\u003e\n\u003cp data-start=\"896\" data-end=\"922\"\u003eTrusted Aqua One quality\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Aqua One","offers":[{"title":"Default Title","offer_id":41849221939277,"sku":"","price":5.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/10307.jpg?v=1749200281"},{"product_id":"aqua-one-st-3-electronic-thermometer","title":"Aqua One ST-3 Electronic Thermometer","description":"\u003cp data-start=\"154\" data-end=\"436\"\u003e\u003cstrong data-start=\"154\" data-end=\"177\"\u003eProduct Description\u003c\/strong\u003e\u003cbr data-start=\"177\" data-end=\"180\"\u003eThe Aqua One ST-3 Electronic Thermometer offers accurate, real-time temperature monitoring for your aquarium. Featuring a clear LCD display and an external water-resistant probe, this unit makes it easy to keep your tank within the ideal temperature range.\u003c\/p\u003e\n\u003cp data-start=\"438\" data-end=\"678\"\u003eThe thermometer attaches to the outside of your tank while the probe sits inside the water for reliable readings. Suitable for both freshwater and marine aquariums, the ST-3 is a must-have for maintaining a stable environment for your fish.\u003c\/p\u003e\n\u003cul data-start=\"680\" data-end=\"922\"\u003e\n\u003cli data-start=\"680\" data-end=\"733\"\u003e\n\u003cp data-start=\"682\" data-end=\"733\"\u003eAccurate temperature readings with ±1°C precision\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"734\" data-end=\"771\"\u003e\n\u003cp data-start=\"736\" data-end=\"771\"\u003eDisplays in Celsius or Fahrenheit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"772\" data-end=\"826\"\u003e\n\u003cp data-start=\"774\" data-end=\"826\"\u003eWater-resistant probe for direct water measurement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"827\" data-end=\"855\"\u003e\n\u003cp data-start=\"829\" data-end=\"855\"\u003eEasy-to-read LCD display\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"856\" data-end=\"890\"\u003e\n\u003cp data-start=\"858\" data-end=\"890\"\u003eCompact and unobtrusive design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"891\" data-end=\"922\"\u003e\n\u003cp data-start=\"893\" data-end=\"922\"\u003eSuitable for all tank types\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Aqua One","offers":[{"title":"Default Title","offer_id":41849257066573,"sku":"","price":13.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/10299.jpg?v=1749202768"},{"product_id":"aqua-one-glass-nano-betta-preset-26c-heater","title":"Aqua One Glass Nano Betta Preset 26c Heater","description":"\u003cp data-start=\"173\" data-end=\"470\"\u003eThe Aqua One Glass Nano Betta Preset Heater is a compact and reliable solution for smaller aquariums, preset to maintain your tank at a stable 25 °C (±1 °C). Ideal for Betta, tropical, or marine nano tanks, this durable glass heater is designed for simplicity and safety.\u003c\/p\u003e\n\u003cp data-start=\"472\" data-end=\"534\"\u003eAvailable in three wattage options to suit your aquarium size:\u003c\/p\u003e\n\u003cul data-start=\"535\" data-end=\"729\"\u003e\n\u003cli data-start=\"535\" data-end=\"605\"\u003e\n\u003cp data-start=\"537\" data-end=\"605\"\u003e\u003cstrong data-start=\"537\" data-end=\"545\"\u003e10 W\u003c\/strong\u003e heater (approx. 12–12.5 cm in length) for tanks up to 8 L\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"606\" data-end=\"667\"\u003e\n\u003cp data-start=\"608\" data-end=\"667\"\u003e\u003cstrong data-start=\"608\" data-end=\"616\"\u003e25 W\u003c\/strong\u003e heater (approx. 14–14.8 cm) for tanks up to 20 L\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"668\" data-end=\"729\"\u003e\n\u003cp data-start=\"670\" data-end=\"729\"\u003e\u003cstrong data-start=\"670\" data-end=\"678\"\u003e50 W\u003c\/strong\u003e heater (approx. 16–16.5 cm) for tanks up to 40 L\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"731\" data-end=\"1008\"\u003eEach preset heater is easy to install—just place it in the tank and plug in. The oil-free glass construction is durable and suitable for both freshwater and marine use. With a preset temperature and robust build, this heater offers peace of mind and consistent aquatic comfort.\u003c\/p\u003e\n\u003cul data-start=\"1010\" data-end=\"1289\"\u003e\n\u003cli data-start=\"1010\" data-end=\"1055\"\u003e\n\u003cp data-start=\"1012\" data-end=\"1055\"\u003ePreset thermostat maintains 25 °C (±1 °C)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1056\" data-end=\"1118\"\u003e\n\u003cp data-start=\"1058\" data-end=\"1118\"\u003eAvailable in 10 W, 25 W, and 50 W for different tank sizes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1119\" data-end=\"1160\"\u003e\n\u003cp data-start=\"1121\" data-end=\"1160\"\u003eDurable, fully submersible glass body\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1161\" data-end=\"1219\"\u003e\n\u003cp data-start=\"1163\" data-end=\"1219\"\u003eSafe for Betta, freshwater, tropical, and marine tanks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1220\" data-end=\"1251\"\u003e\n\u003cp data-start=\"1222\" data-end=\"1251\"\u003eEasy to set up and maintain\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Aqua One","offers":[{"title":"10w","offer_id":41856159318093,"sku":"","price":34.99,"currency_code":"NZD","in_stock":true},{"title":"25w","offer_id":41856159350861,"sku":"","price":38.99,"currency_code":"NZD","in_stock":true},{"title":"50w","offer_id":41856159383629,"sku":"","price":41.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/15040.jpg?v=1749543270"},{"product_id":"aquaone-titanium-heater","title":"AquaOne Titanium Heater","description":"\u003cp data-end=\"107\" data-start=\"44\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eThe Aqua One Titanium Heater series combines durability and precision for reliable temperature control in freshwater, tropical, and marine aquariums. Constructed from corrosion-resistant titanium, these heaters include an external controller with an adjustable temperature range between 14 °C and 34 °C. A built-in LED indicator shows when the heater is actively warming water, while suction cups enable secure installation inside the tank. Suitable for a wide range of aquatic setups, this heater delivers consistent performance without the risk of glass shattering or internal corrosion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"146\" data-start=\"109\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eAvailable in three sizes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-end=\"195\" data-start=\"147\"\u003e\n\u003cli data-end=\"165\" data-start=\"156\"\u003e\n\u003cp data-end=\"165\" data-start=\"158\"\u003e100 W\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"185\" data-start=\"176\"\u003e\n\u003cp data-end=\"185\" data-start=\"178\"\u003e300 W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"195\" data-start=\"186\"\u003e\n\u003cp data-end=\"195\" data-start=\"188\"\u003e500 W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"234\" data-start=\"197\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eEach model maintains your desired temperature by automatically switching off when the setpoint is reached and restarting when water cools. With titanium housing, adjustable control, and built-in safety features, these heaters offer long-lasting reliability for serious aquarists.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"252\" data-start=\"236\"\u003e\u003cstrong data-end=\"252\" data-start=\"236\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"548\" data-start=\"253\"\u003e\n\u003cli data-end=\"294\" data-start=\"253\"\u003e\n\u003cp data-end=\"294\" data-start=\"255\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eCorrosion-resistant titanium construction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"336\" data-start=\"295\"\u003e\n\u003cp data-end=\"336\" data-start=\"297\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eExternal thermostat controller (14 °C–34 °C range)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"378\" data-start=\"337\"\u003e\n\u003cp data-end=\"378\" data-start=\"339\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eLED heat-on indicator\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"420\" data-start=\"379\"\u003e\n\u003cp data-end=\"420\" data-start=\"381\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eFully submersible with suction cup fixation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"462\" data-start=\"421\"\u003e\n\u003cp data-end=\"462\" data-start=\"423\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eSafe for freshwater, tropical, and marine tanks\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"504\" data-start=\"463\"\u003e\n\u003cp data-end=\"504\" data-start=\"465\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eDurable, shatter-proof design\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"449\" data-start=\"166\"\u003e\n\u003cthead data-end=\"215\" data-start=\"166\"\u003e\n\u003ctr data-end=\"215\" data-start=\"166\"\u003e\n\u003cth data-col-size=\"sm\" data-end=\"180\" data-start=\"166\"\u003e\u003cstrong data-end=\"179\" data-start=\"168\"\u003eWattage\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth data-col-size=\"md\" data-end=\"215\" data-start=\"180\"\u003e\u003cstrong data-end=\"205\" data-start=\"182\"\u003eSuggested Tank Size\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"449\" data-start=\"267\"\u003e\n\u003ctr data-end=\"324\" data-start=\"267\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"281\" data-start=\"267\"\u003e100 W\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"324\" data-start=\"281\"\u003eSmall to mid-sized tanks (up to ~100 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"382\" data-start=\"325\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"339\" data-start=\"325\"\u003e300 W\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"382\" data-start=\"339\"\u003eLarge aquariums (up to ~300 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"449\" data-start=\"383\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"397\" data-start=\"383\"\u003e500 W\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"449\" data-start=\"397\"\u003eExtra-large or high-demand setups (up to ~500 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Aqua One","offers":[{"title":"Titanium Heater 100W","offer_id":41856167084109,"sku":"","price":109.99,"currency_code":"NZD","in_stock":true},{"title":"Titanium Heater 300W","offer_id":41856167116877,"sku":"","price":119.99,"currency_code":"NZD","in_stock":true},{"title":"Titanium Heater 500W","offer_id":41856167149645,"sku":"","price":129.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/15059.jpg?v=1749628517"},{"product_id":"chihiros-heater-pro-10-1000w","title":"Chihiros Heater Pro 10–1000W","description":"\u003ch3 data-start=\"186\" data-end=\"220\"\u003eChihiros Heater Pro 10–1000W\u003c\/h3\u003e\n\u003cp data-start=\"221\" data-end=\"665\"\u003eThe \u003cstrong data-start=\"225\" data-end=\"248\"\u003eChihiros Heater Pro\u003c\/strong\u003e is a next-generation \u003cstrong data-start=\"270\" data-end=\"296\"\u003einline aquarium heater\u003c\/strong\u003e designed to connect directly to your external canister filter. By integrating with your filtration system, it provides precise, evenly distributed heating throughout your aquarium while keeping equipment out of sight. Available in models from \u003cstrong data-start=\"540\" data-end=\"559\"\u003e10W up to 1000W\u003c\/strong\u003e, it offers a solution for aquariums of all sizes — from small planted tanks to large tropical displays.\u003c\/p\u003e\n\u003cp data-start=\"667\" data-end=\"686\"\u003e\u003cstrong data-start=\"667\" data-end=\"684\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"687\" data-end=\"1367\"\u003e\n\u003cli data-start=\"687\" data-end=\"836\"\u003e\n\u003cp data-start=\"689\" data-end=\"836\"\u003e\u003cstrong data-start=\"689\" data-end=\"718\"\u003eInline Heating Technology\u003c\/strong\u003e – Connects directly to your canister filter’s hose, ensuring heated water is circulated evenly across the aquarium.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"837\" data-end=\"941\"\u003e\n\u003cp data-start=\"839\" data-end=\"941\"\u003e\u003cstrong data-start=\"839\" data-end=\"862\"\u003eUncluttered Display\u003c\/strong\u003e – No bulky heaters inside the tank, allowing for a clean, natural aquascape.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"942\" data-end=\"1059\"\u003e\n\u003cp data-start=\"944\" data-end=\"1059\"\u003e\u003cstrong data-start=\"944\" data-end=\"984\"\u003eAccurate Digital Temperature Control\u003c\/strong\u003e – Maintains stable conditions critical for fish health and plant growth.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1060\" data-end=\"1167\"\u003e\n\u003cp data-start=\"1062\" data-end=\"1167\"\u003e\u003cstrong data-start=\"1062\" data-end=\"1084\"\u003eWide Wattage Range\u003c\/strong\u003e – From compact 10W models for nanos to powerful 1000W options for large systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1168\" data-end=\"1275\"\u003e\n\u003cp data-start=\"1170\" data-end=\"1275\"\u003e\u003cstrong data-start=\"1170\" data-end=\"1196\"\u003eAdvanced Safety System\u003c\/strong\u003e – Built-in overheat protection and automatic shutoff for reliable operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1276\" data-end=\"1367\"\u003e\n\u003cp data-start=\"1278\" data-end=\"1367\"\u003e\u003cstrong data-start=\"1278\" data-end=\"1303\"\u003ePremium Build Quality\u003c\/strong\u003e – Durable construction designed for long-lasting performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1369\" data-end=\"1584\"\u003eBy heating water externally and distributing it through your canister filter, the \u003cstrong data-start=\"1451\" data-end=\"1474\"\u003eChihiros Heater Pro\u003c\/strong\u003e eliminates hot spots, enhances temperature stability, and creates a visually seamless aquarium environment.\u003c\/p\u003e","brand":"Chihiros","offers":[{"title":"Filter Hose Size 12\/16mm","offer_id":42130342346829,"sku":null,"price":206.99,"currency_code":"NZD","in_stock":false},{"title":"Filter Hose Size 16\/22mm","offer_id":42130342379597,"sku":null,"price":206.99,"currency_code":"NZD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/chihiros-heater-pro-smart-external-aquarium-heater-10w1000w-588156.jpg?v=1758752531"},{"product_id":"aqua-one-glass-premium-thermometer-15cm","title":"Aqua One Glass Premium Thermometer 15cm","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eThe \u003cstrong\u003eAqua One Glass Premium Thermometer\u003c\/strong\u003e is a simple and reliable way to monitor the water temperature in your aquarium. Measuring \u003cstrong\u003e15cm long\u003c\/strong\u003e, its clear glass design provides an easy-to-read temperature display to help ensure your fish are kept within a suitable and stable temperature range.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eRegular temperature monitoring is an essential part of aquarium care, allowing you to quickly identify unexpected temperature changes or potential heater issues.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003cbr\u003e✔ \u003cstrong\u003e15cm glass aquarium thermometer\u003c\/strong\u003e\u003cbr\u003e✔ Provides quick and easy temperature monitoring\u003cbr\u003e✔ Clear, easy-to-read temperature scale\u003cbr\u003e✔ Compact design fits neatly inside the aquarium\u003cbr\u003e✔ Helps monitor heater performance\u003cbr\u003e✔ Allows you to identify unexpected temperature fluctuations\u003cbr\u003e✔ No batteries or power required\u003cbr\u003e✔ Suitable for freshwater and marine aquariums\u003cbr\u003e✔ Simple and reliable aquarium essential\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003cbr\u003e✔ Tropical freshwater aquariums\u003cbr\u003e✔ Coldwater aquariums\u003cbr\u003e✔ Marine aquariums\u003cbr\u003e✔ Checking aquarium heater performance\u003cbr\u003e✔ New aquarium setups\u003cbr\u003e✔ Everyday temperature monitoring\u003c\/p\u003e","brand":"Aqua One","offers":[{"title":"Default Title","offer_id":43727887401037,"sku":null,"price":7.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/10309.jpg?v=1788744929"},{"product_id":"aqua-one-glass-nano-thermometer-9cm","title":"Aqua One Glass Nano Thermometer 9cm","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eThe \u003cstrong\u003eAqua One Glass Nano Thermometer\u003c\/strong\u003e is a compact and reliable thermometer designed for monitoring water temperature in \u003cstrong\u003enano and smaller aquariums\u003c\/strong\u003e. At just \u003cstrong\u003e9cm long\u003c\/strong\u003e, its small profile takes up minimal space while providing an easy way to keep an eye on your aquarium's temperature.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eRegular temperature monitoring helps ensure stable conditions for your fish and makes it easy to identify unexpected fluctuations or potential heater issues.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003cbr\u003e✔ Compact \u003cstrong\u003e9cm glass aquarium thermometer\u003c\/strong\u003e\u003cbr\u003e✔ Ideal for nano and smaller aquariums\u003cbr\u003e✔ Clear, easy-to-read temperature scale\u003cbr\u003e✔ Small profile takes up minimal aquarium space\u003cbr\u003e✔ Helps monitor aquarium heater performance\u003cbr\u003e✔ Quickly identify temperature fluctuations\u003cbr\u003e✔ No batteries or power required\u003cbr\u003e✔ Suitable for freshwater and marine aquariums\u003cbr\u003e✔ Simple and reliable aquarium essential\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003cbr\u003e✔ Nano aquariums\u003cbr\u003e✔ Betta aquariums\u003cbr\u003e✔ Small tropical aquariums\u003cbr\u003e✔ Coldwater aquariums\u003cbr\u003e✔ Marine nano aquariums\u003cbr\u003e✔ Everyday temperature monitoring\u003c\/p\u003e","brand":"Aqua One","offers":[{"title":"Default Title","offer_id":43727957196877,"sku":null,"price":6.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/10310.jpg?v=1788746431"}],"url":"https:\/\/simplyfish.co.nz\/collections\/heating.oembed","provider":"Simply Fish","version":"1.0","type":"link"}