{"product_id":"calcium-magnesium-refill-reagents","title":"Calcium \u0026 Magnesium Refill Reagents","description":"\u003ch2\u003eBenchmark Calcium \u0026amp; Magnesium Reagent Kit\u003c\/h2\u003e\n\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Benchmark Calcium \u0026amp; Magnesium Reagent Kit is a refill set for the Benchmark Calcium \u0026amp; Magnesium Test Kit. It includes the liquid and powder reagents used to run both the calcium and total hardness procedures, so you can continue testing without replacing the full kit.\u003c\/p\u003e\n\n\u003cp\u003eThis reagent set is intended for reef hobbyists who already have the required testing tools and want a convenient way to restock their calcium and magnesium test supplies.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eThis reagent kit supports calcium testing in ppm and magnesium calculation in ppm using the Benchmark calcium and total hardness methods.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCalcium (ppm) = mL calcium titrant used x 600\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMagnesium (ppm) = (1701.35 x mL total hardness titrant) - (363.87 x mL calcium titrant)\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIt is useful for monitoring major-element consumption, checking dosing adjustments, and maintaining stable calcium and magnesium levels in reef aquariums.\u003c\/p\u003e\n\n\u003ch3\u003eWho It’s For\u003c\/h3\u003e\n\u003cp\u003eThis reagent kit is intended for hobbyists who already own the Benchmark Calcium \u0026amp; Magnesium Test Kit hardware and need replacement reagents for continued testing.\u003c\/p\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCalcium Test\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003eAdd 5.00 mL aquarium water to the test vial.\u003c\/li\u003e\n  \u003cli\u003eAdd 1.00 mL of 4% sodium hydroxide.\u003c\/li\u003e\n  \u003cli\u003eAdd one level scoop of calcium indicator powder.\u003c\/li\u003e\n  \u003cli\u003eSlowly add calcium titrant while swirling.\u003c\/li\u003e\n  \u003cli\u003eStop when the color changes to purple.\u003c\/li\u003e\n  \u003cli\u003eCalculate calcium using: \u003cstrong\u003emL x 600\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eTotal Hardness \/ Magnesium Test\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003eAdd 5.00 mL aquarium water to a clean vial.\u003c\/li\u003e\n  \u003cli\u003eAdd 0.50 mL pH 10 hardness buffer.\u003c\/li\u003e\n  \u003cli\u003eAdd calmagite indicator.\u003c\/li\u003e\n  \u003cli\u003eSlowly add total hardness titrant while swirling.\u003c\/li\u003e\n  \u003cli\u003eStop when the solution turns pure blue with no red or purple tint remaining.\u003c\/li\u003e\n  \u003cli\u003eUse the calcium and total hardness readings together to calculate magnesium.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e118 mL calcium titrant bottle\u003c\/li\u003e\n  \u003cli\u003e118 mL total hardness titrant bottle\u003c\/li\u003e\n  \u003cli\u003e118 mL 4% sodium hydroxide bottle\u003c\/li\u003e\n  \u003cli\u003e118 mL pH 10 hardness buffer bottle\u003c\/li\u003e\n  \u003cli\u003eCalmagite indicator bottle\u003c\/li\u003e\n  \u003cli\u003eCalcium indicator powder container\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eReagent refill only\u003c\/li\u003e\n  \u003cli\u003eDesigned for the Benchmark Calcium \u0026amp; Magnesium Test Kit method\u003c\/li\u003e\n  \u003cli\u003eUses a 5.00 mL sample volume\u003c\/li\u003e\n  \u003cli\u003eFor saltwater aquarium use\u003c\/li\u003e\n  \u003cli\u003eStore reagents sealed at room temperature\u003c\/li\u003e\n  \u003cli\u003eProtect indicator solutions from light and keep powder reagents dry\u003c\/li\u003e\n  \u003cli\u003eKeep out of reach of children\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePurchase Confidence\u003c\/h3\u003e\n\u003cp\u003eThe Benchmark Calcium \u0026amp; Magnesium Reagent Kit gives you a practical way to keep testing without replacing the full kit. It is a straightforward refill option for reef hobbyists who want to stay consistent with calcium and magnesium monitoring.\u003c\/p\u003e","brand":"Benchmark","offers":[{"title":"Default Title","offer_id":48124623290622,"sku":null,"price":39.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0058\/6242\/4647\/files\/calcium-magnesium-refill.png?v=1777385291","url":"https:\/\/ndaquaculture.ca\/products\/calcium-magnesium-refill-reagents","provider":"New Dawn Aquaculture","version":"1.0","type":"link"}