{"product_id":"hanna-marine-magnesium-checker-hc-hi783","title":"Hanna Marine Magnesium Checker HC – HI783","description":"\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003ehe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHanna Marine Magnesium Checker HC (HI783)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e takes the guesswork out of testing magnesium levels in your marine aquarium. Designed specifically for saltwater aquariums and reef tanks, this digital handheld colorimeter delivers easy-to-read magnesium measurements without the hassle of interpreting colour changes in traditional test kits.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMagnesium is essential for maintaining a healthy reef aquarium, helping stabilise calcium and alkalinity levels while supporting coral growth and skeletal development. The Hanna HI783 makes it easy to monitor magnesium levels, giving you greater confidence when managing your reef tank's water chemistry.\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\u003cstrong\u003e\u003cspan\u003eDigital Magnesium Testing\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Clear LCD display provides results directly in ppm, eliminating colour-matching guesswork.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDesigned for Marine Aquariums\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Ideal for reef tanks, coral aquariums and fish-only saltwater systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAccurate Measurements\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Measures magnesium between 1000 and 1800 ppm with 5 ppm resolution.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSimple One-Button Operation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Easy to use for both beginner and experienced reef keepers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCompact \u0026amp; Portable\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Lightweight handheld design makes regular aquarium testing convenient.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e25 Tests Included\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Comes with magnesium reagents for 25 tests, so you're ready to start testing.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eReplaceable Reagents\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Compatible with Hanna HI783-25 Marine Magnesium Reagents.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e HI783\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTesting Parameter:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Magnesium (Mg)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMeasurement Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1000–1800 ppm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eResolution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 5 ppm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAccuracy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ±5% of reading at 25°C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTesting Method:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Colorimetric EDTA method\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eLight Source:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e LED at 610 nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBattery:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1 × AAA (included)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAutomatic Shut-Off:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e After 10 minutes of inactivity\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\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHanna HI783 Marine Magnesium Checker HC\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMagnesium reagents for 25 tests\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2 glass cuvettes with caps\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2 colour-coded 5 mL syringes with tips\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 AAA battery\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eInstruction manual and quick-reference guide\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eWhy Choose Hanna?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIf you're serious about maintaining stable water parameters in your reef aquarium, the Hanna Checker range is an excellent investment. With straightforward digital measurements and convenient testing, monitoring your magnesium levels becomes a much simpler part of your regular aquarium maintenance routine.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mediray","offers":[{"title":"Default Title","offer_id":67694405648461,"sku":null,"price":189.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/2180\/0269\/files\/HannaMarineMagnesiumCheckerHC_HI783.png?v=1792015667","url":"https:\/\/simplyfish.co.nz\/products\/hanna-marine-magnesium-checker-hc-hi783","provider":"Simply Fish","version":"1.0","type":"link"}