{"product_id":"hanna-marine-calcium-checker-hc-hi758","title":"Hanna Marine Calcium Checker HC – HI758","description":"\u003cp data-pm-slice=\"1 3 []\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHanna Marine Calcium Checker HC – HI758\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a digital calcium tester designed specifically for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003esaltwater and reef aquariums\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, giving you a clear calcium reading in ppm without having to judge subtle colour changes by eye.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor reef keepers who regularly monitor calcium and want more confidence in their testing, the HI758 provides a simple digital method with a measurement range of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e200–600 ppm calcium\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and a resolution of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1 ppm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. It is particularly useful for aquariums containing LPS, SPS and other calcifying organisms where calcium consumption needs to be monitored alongside alkalinity and magnesium.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDigital calcium testing for marine and reef aquariums\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMeasures calcium from \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e200–600 ppm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e1 ppm resolution\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAccuracy of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e±6 ppm ±5% of reading at 25°C\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLarge, easy-to-read digital display\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRemoves the need to visually interpret a colour-change endpoint\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSimple one-button operation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAutomatic shut-off to preserve battery life\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSupplied with reagents for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e25 tests\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReplacement \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHI758-26 Calcium Reagents\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e available separately\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompact protective storage case included\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIdeal for regular reef aquarium testing and dosing management\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eWhy Test Calcium?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eCalcium is one of the key parameters to monitor in a reef aquarium. Stony corals, coralline algae and other calcifying marine organisms continually use calcium as they build their skeletons and structures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAs a reef aquarium grows, its calcium demand can change considerably. Regular testing allows you to see how quickly calcium is being consumed and adjust supplementation, two-part dosing, Balling methods or calcium reactor settings accordingly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTesting calcium alongside \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ealkalinity and magnesium\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e provides a much clearer picture of your reef aquarium's overall mineral balance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDigital Results Without Colour Guesswork\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eTraditional calcium test kits generally rely on watching for a colour change and deciding when the test has reached its endpoint.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe HI758 instead uses a handheld colorimeter to measure the reaction and displays the result directly in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eppm calcium\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e on its LCD screen.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis makes it particularly useful for reef keepers who prefer a repeatable testing process without having to compare colours manually.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Testing Information\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe HI758 uses a very small marine water sample and requires \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ecalcium-free deionised or suitable distilled water\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e during the testing procedure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBecause the test is sensitive to very small amounts of calcium contamination, Hanna recommends taking care to keep the cuvettes and testing equipment clean. Residual calcium from tap water or unsuitable purified water can affect the result.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor consistent results:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFollow the supplied HI758 testing procedure carefully\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eUse clean cuvettes and testing equipment\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAvoid rinsing the test cuvette with tap water before testing\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eUse suitable calcium-free deionised or distilled water\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eKeep fingerprints, salt and water droplets off the outside of the cuvette\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMeasure liquids accurately using the supplied syringes and pipette\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eWhat's Included\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe Hanna HI758 is supplied as a complete testing kit with:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHanna HI758 Marine Calcium Checker HC\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e2 sample cuvettes with caps\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHI758 Marine Calcium starter reagents for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e25 tests\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1ml syringe with tip\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMinipipette with tip\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePlastic pipette\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 x AAA battery\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProtective storage case with custom insert\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eInstruction manual\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eParameter:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Calcium\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Saltwater and marine aquariums\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eMeasurement Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 200–600 ppm Ca²⁺\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eResolution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1 ppm\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eAccuracy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ±6 ppm ±5% of reading at 25°C\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eLight Source:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e LED at 610nm\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eLight Detector:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Silicon photocell\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eTest Method:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Adaptation of the Zincon Method\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eBattery:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1 x AAA alkaline battery\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 86 x 61 x 37.5mm\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eWeight:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 64g\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eReplacement Reagents\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eOnce the included reagents have been used, the Checker can be refilled using:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHanna HI758-26 Marine Calcium Reagents – 25 Tests\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Checker itself does not need to be replaced each time the reagents run out.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003ePerfect For\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReef aquariums\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMarine aquariums\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSPS and LPS coral systems\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMonitoring calcium consumption\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAquariums using calcium supplementation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eTwo-part and Balling dosing systems\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCalcium reactor users\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReef keepers wanting a digital alternative to traditional colour-change calcium tests\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eNew Zealand marine aquarium keepers wanting reliable ongoing calcium monitoring\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mediray","offers":[{"title":"Default Title","offer_id":67937269383245,"sku":null,"price":189.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/HANNA_Handheld_Colorimeter_Marine_Calcium_1_538x_860e0ad9-807b-424f-af13-5e337c89e60a.webp?v=1794347722","url":"https:\/\/simplyfish.co.nz\/products\/hanna-marine-calcium-checker-hc-hi758","provider":"Simply Fish","version":"1.0","type":"link"}