{"title":"Hanna Instruments","description":"\u003ch2\u003eHanna Instruments Aquarium Testing \u0026amp; Water Quality\u003c\/h2\u003e\n\u003cp\u003eShop \u003cstrong\u003eHanna Instruments\u003c\/strong\u003e aquarium testing equipment, digital Checkers, meters, reagents, calibration solutions, and water-quality testing supplies for saltwater, reef, and marine aquariums.\u003c\/p\u003e\n\u003cp\u003eHanna Instruments is known for precision digital testing that replaces difficult-to-interpret color charts with clear numerical readings. From alkalinity and phosphate to nitrate, calcium, salinity, pH, and copper, Hanna testing equipment helps aquarists monitor critical water parameters with confidence.\u003c\/p\u003e\n\u003cp\u003eExplore Hanna Instruments products including:\u003c\/p\u003e\n\u003cp\u003eDigital Checker Colorimeters\u003c\/p\u003e\n\u003cp\u003eAlkalinity, Phosphate, Nitrate \u0026amp; Calcium Testing\u003c\/p\u003e\n\u003cp\u003eDigital Salinity \u0026amp; pH Testers\u003c\/p\u003e\n\u003cp\u003eCopper Testing\u003c\/p\u003e\n\u003cp\u003eReplacement Reagents\u003c\/p\u003e\n\u003cp\u003eCalibration \u0026amp; Reference Solutions\u003c\/p\u003e\n\u003cp\u003eTesting Accessories \u0026amp; Replacement Supplies\u003c\/p\u003e\n\u003cp\u003eWhether you're maintaining a mixed reef, SPS system, fish-only aquarium, or quarantine setup, Hanna Instruments provides accurate testing tools for routine maintenance, troubleshooting, and precise aquarium management.\u003c\/p\u003e\n\u003cp\u003eShop Hanna Instruments at Infinity and Beyond Aquatics for dependable aquarium testing equipment, replacement reagents, and water-quality supplies.\u003c\/p\u003e","products":[{"product_id":"hanna-instruments-marine-nitrate-high-range-checker-hc","title":"Hanna Instruments Marine Nitrate High Range Checker HC","description":"\u003ch2\u003eFast, Digital Nitrate Testing for Saltwater Aquariums\u003c\/h2\u003e\n\u003cp\u003eTake the guesswork out of nitrate testing with the \u003cstrong\u003eHanna Instruments HI782 Marine Nitrate High Range Checker HC\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for saltwater aquariums and marine applications, the HI782 provides a clear digital nitrate reading without relying on color charts or trying to decide which shade your test sample matches.\u003c\/p\u003e\n\u003cp\u003eWith a testing range of \u003cstrong\u003e0.0 to 75.0 ppm nitrate\u003c\/strong\u003e, the HI782 is an excellent everyday testing tool for reef tanks, fish-only marine systems, and other saltwater aquariums where nitrate monitoring is an important part of maintaining water quality.\u003c\/p\u003e\n\u003ch3\u003eDigital Results Without Color Matching\u003c\/h3\u003e\n\u003cp\u003eTraditional nitrate kits require visually comparing a sample against a color chart. The HI782 uses a handheld colorimeter to analyze the sample and display the nitrate concentration directly on its LCD screen.\u003c\/p\u003e\n\u003cp\u003eSimply prepare your sample using the included reagent and follow the testing procedure for an easy-to-read digital result.\u003c\/p\u003e\n\u003ch3\u003eMade Specifically for Seawater\u003c\/h3\u003e\n\u003cp\u003eThe HI782 was developed specifically for nitrate testing in seawater.\u003c\/p\u003e\n\u003cp\u003eIt measures nitrate from \u003cstrong\u003e0.0 to 75.0 ppm as NO₃⁻\u003c\/strong\u003e with a resolution of \u003cstrong\u003e0.1 ppm\u003c\/strong\u003e, making it useful for monitoring both nutrient-controlled reef systems and marine aquariums running at higher nitrate levels.\u003c\/p\u003e\n\u003ch3\u003eSimple One-Reagent Testing\u003c\/h3\u003e\n\u003cp\u003eThe HI782 uses a streamlined testing procedure requiring only one reagent packet per test, making regular nitrate monitoring easier to incorporate into aquarium maintenance.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cp\u003e• Designed specifically for saltwater and marine aquariums\u003cbr\u003e• Digital nitrate readings with no visual color matching\u003cbr\u003e• Measures nitrate from 0.0 to 75.0 ppm\u003cbr\u003e• 0.1 ppm resolution\u003cbr\u003e• Accuracy of ±2.0 ppm ±5% of reading at 77°F\u003cbr\u003e• Simple one-button operation\u003cbr\u003e• Requires only one reagent per test\u003cbr\u003e• Compact handheld design\u003cbr\u003e• Automatic shutoff after 10 minutes of inactivity\u003cbr\u003e• Replaceable AAA battery\u003cbr\u003e• Replacement HI782-25 reagent sets available separately\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e HI782\u003cbr\u003e\u003cstrong\u003eParameter:\u003c\/strong\u003e Nitrate\u003cbr\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e 0.0 to 75.0 ppm as NO₃⁻\u003cbr\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.1 ppm\u003cbr\u003e\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±2.0 ppm ±5% of reading at 77°F \/ 25°C\u003cbr\u003e\u003cstrong\u003eMethod:\u003c\/strong\u003e Zinc Reduction Method\u003cbr\u003e\u003cstrong\u003eLight Source:\u003c\/strong\u003e LED at 525 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\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e• Hanna Instruments HI782 Marine Nitrate High Range Checker HC\u003cbr\u003e• 2 sample cuvettes with caps\u003cbr\u003e• Starter reagent kit for 10 tests\u003cbr\u003e• 3 mL Pasteur pipette\u003cbr\u003e• AAA battery\u003cbr\u003e• Instruction manual\u003cbr\u003e• Protective carrying case with custom insert\u003c\/p\u003e\n\u003ch3\u003eWhy Buy From Infinity and Beyond Aquatics?\u003c\/h3\u003e\n\u003cp\u003eReliable water testing is one of the foundations of a healthy aquarium. Infinity and Beyond Aquatics carries testing equipment for aquarists who want straightforward, repeatable information about what's happening in their water.\u003c\/p\u003e\n\u003cp\u003eThe Hanna HI782 makes routine nitrate testing easy to read and eliminates one of the biggest frustrations of traditional test kits: interpreting color charts.\u003c\/p\u003e\n\u003ch3\u003eShipping\u003c\/h3\u003e\n\u003cp\u003eThis product qualifies toward our \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","brand":"SWA","offers":[{"title":"Default Title","offer_id":53221528961333,"sku":"HI782","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0964\/2252\/7285\/files\/HI782-HR-Nitrate-Checker-and-Box-1000x1000__59468.jpg?v=1785206660"},{"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"},{"product_id":"hanna-instruments-marine-phosphate-ultra-low-range-checker-hc","title":"Hanna Instruments Marine Phosphate Ultra Low Range Checker HC","description":"\u003ch2\u003ePrecision Phosphate Testing for Reef Aquariums\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHanna Instruments HI774 Marine Phosphate Ultra Low Range Checker HC\u003c\/strong\u003e makes monitoring low phosphate levels in saltwater aquariums simple, precise, and easy to read.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for marine systems and reef tanks, the HI774 provides a \u003cstrong\u003edigital phosphate reading\u003c\/strong\u003e without relying on traditional color charts. With an ultra-low measurement range designed for reef aquarium conditions, it's an excellent tool for keeping nutrient levels under control while avoiding the problems associated with driving phosphate too low.\u003c\/p\u003e\n\u003ch3\u003eDigital Phosphate Results\u003c\/h3\u003e\n\u003cp\u003eTraditional phosphate tests can become difficult to interpret at the low concentrations commonly maintained in reef aquariums.\u003c\/p\u003e\n\u003cp\u003eThe HI774 uses a handheld colorimeter to analyze the sample and displays phosphate concentration directly on its LCD screen, removing the guesswork of visually comparing subtle color differences.\u003c\/p\u003e\n\u003ch3\u003eUltra Low Range for Reef Systems\u003c\/h3\u003e\n\u003cp\u003eThe HI774 measures phosphate from \u003cstrong\u003e0.00 to 0.90 ppm\u003c\/strong\u003e with a resolution of \u003cstrong\u003e0.01 ppm\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis makes it particularly useful for reef aquariums where small changes in phosphate can matter for nutrient management, coral health, algae control, and overall system stability.\u003c\/p\u003e\n\u003ch3\u003eWhy Monitor Phosphate?\u003c\/h3\u003e\n\u003cp\u003ePhosphate is an important nutrient in a reef aquarium, but maintaining an appropriate level is key.\u003c\/p\u003e\n\u003cp\u003eElevated phosphate can contribute to nuisance algae and interfere with coral calcification, while excessively low nutrient levels may also create challenges in reef systems.\u003c\/p\u003e\n\u003cp\u003eRegular testing helps you understand nutrient trends and make informed decisions about feeding, filtration, water changes, phosphate-removal media, and other nutrient-management methods.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cp\u003e• Digital phosphate measurement\u003cbr\u003e• Designed for marine and reef aquariums\u003cbr\u003e• Ultra-low 0.00 to 0.90 ppm measurement range\u003cbr\u003e• 0.01 ppm resolution\u003cbr\u003e• Accuracy of ±0.02 ppm ±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• HI774-25 replacement reagents available separately\u003cbr\u003e• HI774-11 calibration check set available separately\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e HI774\u003cbr\u003e\u003cstrong\u003eParameter:\u003c\/strong\u003e Phosphate\u003cbr\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e 0.00 to 0.90 ppm\u003cbr\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.01 ppm\u003cbr\u003e\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.02 ppm ±5% of reading at 77°F \/ 25°C\u003cbr\u003e\u003cstrong\u003eMethod:\u003c\/strong\u003e Ascorbic Acid Method\u003cbr\u003e\u003cstrong\u003eLight Source:\u003c\/strong\u003e LED at 525 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\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\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e• Hanna Instruments HI774 Marine Phosphate Ultra Low Range Checker HC\u003cbr\u003e• 2 sample cuvettes with caps\u003cbr\u003e• Starter reagent kit for 10 tests\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 nutrient testing makes it easier to understand what's happening inside your reef aquarium. Infinity and Beyond Aquatics carries trusted testing equipment for aquarists who want consistent, easy-to-read results without the guesswork of traditional color charts.\u003c\/p\u003e\n\u003cp\u003eThe Hanna HI774 is an excellent choice for reef keepers who want precise phosphate monitoring as part of their regular aquarium maintenance routine.\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 HI774\u003cbr\u003e\u003cstrong\u003eFor Use With:\u003c\/strong\u003e Saltwater and marine aquariums\u003c\/p\u003e","brand":"SWA","offers":[{"title":"Default Title","offer_id":53221550096693,"sku":"HI774","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0964\/2252\/7285\/files\/HI774-PHOSPHATE-CHECKER-AND-BOX-1000x1000__88912.jpg?v=1785207791"},{"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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0964\/2252\/7285\/collections\/2309da1e-caca-4b0e-a5d2-bece175dfbc3.png?v=1785258196","url":"https:\/\/infinityandbeyondaquatics.com\/collections\/hanna-instruments.oembed","provider":"Infinity and Beyond Aquatics ","version":"1.0","type":"link"}