{"product_id":"hanna-instruments-marine-calcium-checker-hc","title":"Hanna Instruments Marine Calcium Checker HC","description":"\u003ch2\u003eDigital Calcium Testing for Saltwater Aquariums\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHanna Instruments HI758 Marine Calcium Checker HC\u003c\/strong\u003e gives reef keepers a fast, easy way to measure calcium without relying on color charts.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for saltwater aquariums, the HI758 uses a handheld digital colorimeter to measure calcium and display the result directly in ppm, making routine testing easier and more consistent.\u003c\/p\u003e\n\u003cp\u003eFor reef tanks with stony corals, clams, or other calcifying organisms, regular calcium testing is an important part of maintaining stable water chemistry.\u003c\/p\u003e\n\u003ch3\u003eDirect Digital Calcium Results\u003c\/h3\u003e\n\u003cp\u003eTraditional calcium test kits often require multiple titration steps and visual interpretation.\u003c\/p\u003e\n\u003cp\u003eThe HI758 simplifies the process by using a digital colorimeter to analyze the sample and provide a direct calcium concentration reading.\u003c\/p\u003e\n\u003ch3\u003eDesigned for Marine Aquariums\u003c\/h3\u003e\n\u003cp\u003eThe HI758 measures calcium from \u003cstrong\u003e200 to 600 ppm\u003c\/strong\u003e, covering the range commonly encountered in saltwater and reef aquariums.\u003c\/p\u003e\n\u003cp\u003eWith a \u003cstrong\u003e1 ppm resolution\u003c\/strong\u003e, it provides detailed readings for monitoring changes over time.\u003c\/p\u003e\n\u003ch3\u003eWhy Monitor Calcium?\u003c\/h3\u003e\n\u003cp\u003eCalcium is a key component used by corals and other calcifying organisms to build calcium carbonate skeletons.\u003c\/p\u003e\n\u003cp\u003eRegular calcium testing helps reef keepers manage dosing, two-part supplementation, kalkwasser, calcium reactors, and water-change schedules while keeping overall reef chemistry stable.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cp\u003e• Digital calcium readings in ppm\u003cbr\u003e• Designed specifically for saltwater aquariums\u003cbr\u003e• 200 to 600 ppm measurement range\u003cbr\u003e• 1 ppm resolution\u003cbr\u003e• Accuracy of ±6 ppm ±5% of reading at 77°F\u003cbr\u003e• One-button operation\u003cbr\u003e• Compact handheld design\u003cbr\u003e• Automatic shutoff\u003cbr\u003e• Replaceable AAA battery\u003cbr\u003e• HI758-26 replacement reagents available separately\u003cbr\u003e• HI758-11 calibration check set available separately\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e HI758\u003cbr\u003e\u003cstrong\u003eParameter:\u003c\/strong\u003e Calcium\u003cbr\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e 200 to 600 ppm\u003cbr\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e 1 ppm\u003cbr\u003e\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±6 ppm ±5% of reading at 77°F \/ 25°C\u003cbr\u003e\u003cstrong\u003eMethod:\u003c\/strong\u003e Adaptation of the Zincon Method\u003cbr\u003e\u003cstrong\u003eLight Source:\u003c\/strong\u003e LED at 610 nm\u003cbr\u003e\u003cstrong\u003eLight Detector:\u003c\/strong\u003e Silicon Photocell\u003cbr\u003e\u003cstrong\u003eBattery:\u003c\/strong\u003e 1 × 1.5V AAA\u003cbr\u003e\u003cstrong\u003eAuto Shutoff:\u003c\/strong\u003e After 10 minutes of inactivity\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 3.4\" × 2.4\" × 1.5\"\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.3 oz\u003c\/p\u003e\n\u003ch3\u003eImportant Testing Note\u003c\/h3\u003e\n\u003cp\u003eThe HI758 uses a dilution method and requires \u003cstrong\u003edistilled or deionized water that is free of calcium\u003c\/strong\u003e during testing. Calcium present in the dilution water can cause falsely elevated results.\u003c\/p\u003e\n\u003cp\u003eFollowing Hanna's testing procedure carefully is important for achieving accurate and repeatable readings.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e• Hanna Instruments HI758 Marine Calcium Checker HC\u003cbr\u003e• 2 sample cuvettes with caps\u003cbr\u003e• Marine calcium reagent starter kit for 25 tests\u003cbr\u003e• 100 µL pipette\u003cbr\u003e• Syringe with tip\u003cbr\u003e• Plastic pipette\u003cbr\u003e• AAA battery\u003cbr\u003e• Instructions\u003cbr\u003e• Quick Start Guide\u003c\/p\u003e\n\u003ch3\u003eWhy Buy From Infinity and Beyond Aquatics?\u003c\/h3\u003e\n\u003cp\u003eAccurate testing is one of the easiest ways to make reef maintenance more predictable. Infinity and Beyond Aquatics carries trusted testing equipment for aquarists who want clear, repeatable information about their water chemistry.\u003c\/p\u003e\n\u003cp\u003eThe Hanna HI758 gives reef keepers a convenient digital alternative to traditional calcium test kits while helping track one of the most important parameters in a reef system.\u003c\/p\u003e\n\u003ch3\u003eShipping\u003c\/h3\u003e\n\u003cp\u003eThis product qualifies toward \u003cstrong\u003eFREE Standard Shipping on orders over $100\u003c\/strong\u003e within the contiguous United States.\u003c\/p\u003e\n\u003cp\u003eOrders may ship separately from other products depending on inventory location and availability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Hanna Instruments\u003cbr\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e HI758\u003cbr\u003e\u003cstrong\u003eFor Use With:\u003c\/strong\u003e Saltwater and marine aquariums\u003c\/p\u003e","brand":"SWA","offers":[{"title":"Default Title","offer_id":53221564809525,"sku":"HI758","price":69.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0964\/2252\/7285\/files\/HI758-CALCIUM-CHECKER-AND-BOX-1000x1000__98440.jpg?v=1785208115","url":"https:\/\/infinityandbeyondaquatics.com\/products\/hanna-instruments-marine-calcium-checker-hc","provider":"Infinity and Beyond Aquatics ","version":"1.0","type":"link"}