{"product_id":"hanna-instruments-marine-alkalinity-dkh-checker-hc","title":"Hanna Instruments Marine Alkalinity dKH Checker HC","description":"\u003ch2\u003eDigital Alkalinity Testing Without Guessing Colors\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHanna Instruments HI772 Marine Alkalinity dKH Checker HC\u003c\/strong\u003e makes one of the most important reef aquarium tests fast, simple, and easy to read.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for saltwater aquariums, the HI772 measures alkalinity directly in \u003cstrong\u003edKH\u003c\/strong\u003e and displays the result digitally, eliminating the color matching and interpretation required by traditional test kits.\u003c\/p\u003e\n\u003cp\u003eFor reef keepers monitoring alkalinity for coral growth, calcification, dosing, or overall stability, the HI772 is an excellent addition to your regular water-testing routine.\u003c\/p\u003e\n\u003ch3\u003eDirect Digital dKH Results\u003c\/h3\u003e\n\u003cp\u003eInstead of comparing colors or counting drops and interpreting an endpoint, the HI772 uses a handheld colorimeter to measure the sample and display alkalinity directly in dKH.\u003c\/p\u003e\n\u003cp\u003eIts simple one-button operation makes routine testing quick and repeatable.\u003c\/p\u003e\n\u003ch3\u003eDesigned for Marine Aquariums\u003c\/h3\u003e\n\u003cp\u003eThe HI772 measures alkalinity from \u003cstrong\u003e0.0 to 20.0 dKH\u003c\/strong\u003e with a resolution of \u003cstrong\u003e0.1 dKH\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis range makes it suitable for reef tanks, fish-only saltwater systems, frag tanks, and other marine aquariums where alkalinity stability matters.\u003c\/p\u003e\n\u003ch3\u003eSimple Testing Procedure\u003c\/h3\u003e\n\u003cp\u003eFill the cuvette with 10 mL of aquarium water and zero the Checker. Add 1 mL of HI772S reagent, gently mix the sample, return the cuvette to the Checker, and take your reading.\u003c\/p\u003e\n\u003cp\u003eThe alkalinity concentration is displayed directly in dKH.\u003c\/p\u003e\n\u003ch3\u003eWhy Monitor Alkalinity?\u003c\/h3\u003e\n\u003cp\u003eAlkalinity is one of the key parameters for maintaining a stable reef aquarium. Consistent alkalinity supports coral calcification and skeletal growth while helping maintain overall water chemistry and pH stability.\u003c\/p\u003e\n\u003cp\u003eRegular testing is especially important in reef systems using two-part dosing, kalkwasser, calcium reactors, or other supplementation methods.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cp\u003e• Digital alkalinity measurement in dKH\u003cbr\u003e• Designed specifically for saltwater aquariums\u003cbr\u003e• 0.0 to 20.0 dKH measurement range\u003cbr\u003e• 0.1 dKH resolution\u003cbr\u003e• Accuracy of ±0.3 dKH ±5% of reading at 77°F\u003cbr\u003e• Easy one-button operation\u003cbr\u003e• Large digital display\u003cbr\u003e• Compact handheld design\u003cbr\u003e• Automatic shutoff\u003cbr\u003e• Replaceable AAA battery\u003cbr\u003e• HI772 replacement reagents available separately\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e HI772\u003cbr\u003e\u003cstrong\u003eParameter:\u003c\/strong\u003e Marine Alkalinity\u003cbr\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e 0.0 to 20.0 dKH\u003cbr\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.1 dKH\u003cbr\u003e\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.3 dKH ±5% of reading at 77°F \/ 25°C\u003cbr\u003e\u003cstrong\u003eLight Source:\u003c\/strong\u003e LED at 610 nm\u003cbr\u003e\u003cstrong\u003eBattery:\u003c\/strong\u003e 1 × 1.5V AAA\u003cbr\u003e\u003cstrong\u003eAuto Shutoff:\u003c\/strong\u003e After 10 minutes of inactivity\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e• Hanna Instruments HI772 Marine Alkalinity dKH Checker HC\u003cbr\u003e• 2 sample cuvettes with caps\u003cbr\u003e• Reagents for 25 tests\u003cbr\u003e• 1 mL syringe with tip\u003cbr\u003e• AAA battery\u003cbr\u003e• Instruction manual and quick reference guide\u003cbr\u003e• Protective storage case\u003c\/p\u003e\n\u003ch3\u003eWhy Buy From Infinity and Beyond Aquatics?\u003c\/h3\u003e\n\u003cp\u003eReliable testing makes maintaining a stable aquarium easier. Infinity and Beyond Aquatics carries trusted water-testing equipment for reef keepers who want accurate, repeatable information about their aquarium chemistry.\u003c\/p\u003e\n\u003cp\u003eThe Hanna HI772 provides a straightforward digital alkalinity reading, making it easier to track trends and maintain consistent reef parameters.\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 HI772\u003cbr\u003e\u003cstrong\u003eFor Use With:\u003c\/strong\u003e Saltwater and marine aquariums\u003c\/p\u003e","brand":"SWA","offers":[{"title":"Default Title","offer_id":53221539381557,"sku":"HI772","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0964\/2252\/7285\/files\/HI772-ALK-CHECKER-AND-BOX-1000x1000__46600.jpg?v=1785207312","url":"https:\/\/infinityandbeyondaquatics.com\/products\/hanna-instruments-marine-alkalinity-dkh-checker-hc","provider":"Infinity and Beyond Aquatics ","version":"1.0","type":"link"}