{"product_id":"quantum-aragonite-a-calcium","title":"Quantum Aragonite A - Calcium","description":"\u003cstyle\u003e\n  .aq-pd { font-family: Georgia, serif; color: #1a1a1a; max-width: 860px; margin: 0 auto; line-height: 1.7; }\n  .aq-pd h2 { font-size: 1.45em; font-weight: 700; letter-spacing: -0.01em; border-left: 4px solid #006064; padding-left: 12px; margin: 2em 0 0.6em; }\n  .aq-pd h3 { font-size: 1.05em; font-weight: 700; margin: 1.2em 0 0.4em; color: #006064; text-transform: uppercase; letter-spacing: 0.06em; font-family: Arial, sans-serif; }\n  .aq-pd p { margin: 0.5em 0 1em; }\n  .aq-callout { background: #003c3f; color: #fff; border-radius: 4px; padding: 16px 20px; margin: 1.6em 0; font-family: Arial, sans-serif; font-size: 0.93em; line-height: 1.6; }\n  .aq-callout strong { color: #A7FFEB; }\n  .aq-features { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 1em 0 1.6em; }\n  .aq-feature-card { background: #E0F7FA; border-radius: 4px; padding: 14px 16px; border-left: 3px solid #006064; font-family: Arial, sans-serif; font-size: 0.9em; }\n  .aq-feature-card strong { display: block; margin-bottom: 3px; color: #1a1a1a; }\n  .aq-feature-card span { color: #555; }\n  .aq-compare { overflow-x: auto; margin: 1em 0 1.6em; }\n  .aq-compare table { width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 0.88em; min-width: 520px; }\n  .aq-compare th { background: #006064; color: #fff; padding: 9px 14px; text-align: center; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; }\n  .aq-compare th:first-child { background: #003c3f; text-align: left; }\n  .aq-compare td { padding: 8px 14px; border-bottom: 1px solid #d0e8ea; text-align: center; }\n  .aq-compare td:first-child { text-align: left; font-weight: 600; color: #444; background: #f5fbfc; }\n  .aq-compare tr:nth-child(even) td:not(:first-child) { background: #f0fafb; }\n  .aq-specs-table { width: 100%; border-collapse: collapse; margin-top: 1em; font-family: Arial, sans-serif; font-size: 0.93em; }\n  .aq-specs-table th { background: #003c3f; color: #fff; text-align: left; padding: 9px 14px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.82em; }\n  .aq-specs-table td { padding: 8px 14px; border-bottom: 1px solid #e5e5e5; vertical-align: top; }\n  .aq-specs-table tr:nth-child(even) td { background: #f7fcfd; }\n  .aq-specs-table td:first-child { font-weight: 600; width: 45%; color: #444; }\n  .aq-tab-radio { display: none; }\n  .aq-tab-labels { display: flex; flex-wrap: wrap; gap: 8px; margin: 1.4em 0 0; }\n  .aq-tab-label { display: inline-block; padding: 10px 22px; border: 2px solid #006064; background: #fff; color: #006064; font-weight: 700; font-family: Arial, sans-serif; font-size: 0.9em; cursor: pointer; border-radius: 3px; letter-spacing: 0.04em; transition: background 0.15s, color 0.15s; user-select: none; }\n  .aq-tab-label:hover { background: #B2EBF2; }\n  .aq-tab-panel { display: none; }\n  #aq-tab-250:checked ~ .aq-tab-labels label[for=\"aq-tab-250\"],\n  #aq-tab-500:checked ~ .aq-tab-labels label[for=\"aq-tab-500\"],\n  #aq-tab-1000:checked ~ .aq-tab-labels label[for=\"aq-tab-1000\"],\n  #aq-tab-5000:checked ~ .aq-tab-labels label[for=\"aq-tab-5000\"] { background: #006064; color: #fff; }\n  #aq-tab-250:checked ~ .aq-panels #aq-panel-250,\n  #aq-tab-500:checked ~ .aq-panels #aq-panel-500,\n  #aq-tab-1000:checked ~ .aq-panels #aq-panel-1000,\n  #aq-tab-5000:checked ~ .aq-panels #aq-panel-5000 { display: block; }\n  .aq-note { font-family: Arial, sans-serif; font-size: 0.82em; color: #777; margin-top: -0.5em; font-style: italic; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"aq-pd\"\u003e\n\n  \u003cp\u003e\u003cstrong\u003eQuantum Aragonite A\u003c\/strong\u003e is a concentrated liquid calcium supplement and the first part of Quantum's three part Aragonite reef dosing system. Calcium is one of the building blocks your corals, clams, and coralline algae pull from the water every day to grow new skeleton and shell. Aragonite A replaces it in a clean, reef safe form so your tank never runs short. Pair it with \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/quantum-aragonite-b-alkalinity\"\u003eAragonite B (Alkalinity)\u003c\/a\u003e and \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/quantum-aragonite-c-magnesium\"\u003eAragonite C (Magnesium)\u003c\/a\u003e for complete, stable chemistry, and explore the rest of our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003ereef additives and supplements\u003c\/a\u003e.\u003c\/p\u003e\n\n  \u003cdiv class=\"aq-callout\"\u003e\n    \u003cstrong\u003eCalcium never works alone.\u003c\/strong\u003e Calcium, alkalinity, and magnesium move together in a reef tank. Dose Aragonite A alongside \u003cstrong\u003eB and C\u003c\/strong\u003e and test regularly to keep all three locked in their target ranges. That balance is what keeps coral growth steady and color bright.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhy Calcium Matters\u003c\/h2\u003e\n  \u003cp\u003eStony corals (SPS and LPS), clams, snails, and coralline algae all build their structures from calcium carbonate. A growing reef can pull calcium down quickly, and when it drops, growth slows and tips can pale or recede. Aragonite A lets you hold calcium in the ideal \u003cstrong\u003e420 to 440 ppm\u003c\/strong\u003e range. Magnesium (Aragonite C) keeps that calcium and your alkalinity in solution, and alkalinity (Aragonite B) supplies the carbonate side of the equation, which is why the three are dosed as a set.\u003c\/p\u003e\n\n  \u003ch2\u003eFeatures\u003c\/h2\u003e\n  \u003cdiv class=\"aq-features\"\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eConcentrated Calcium\u003c\/strong\u003e\u003cspan\u003eA strong, efficient calcium source that goes a long way per drop.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eReef Safe Formula\u003c\/strong\u003e\u003cspan\u003eClean ingredients formulated specifically for marine and reef aquariums.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003ePart of a 3-Part System\u003c\/strong\u003e\u003cspan\u003eWorks hand in hand with Aragonite B (Alkalinity) and C (Magnesium).\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eBuilt for Calcifiers\u003c\/strong\u003e\u003cspan\u003eSupports SPS, LPS, clams, and coralline algae growth.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eMade in Australia\u003c\/strong\u003e\u003cspan\u003eProduced by Quantum to a consistent, lab tested standard.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"aq-feature-card\"\u003e\n\u003cstrong\u003eFour Sizes\u003c\/strong\u003e\u003cspan\u003eFrom a 250 ml nano bottle to a 5 L jug for large or multiple reefs.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eChoose Your Size\u003c\/h2\u003e\n  \u003cp class=\"aq-note\"\u003eSelect a size in the tab section below for its full detail sheet.\u003c\/p\u003e\n  \u003cdiv class=\"aq-compare\"\u003e\n    \u003ctable\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eSpec\u003c\/th\u003e\n          \u003cth\u003e250 ml\u003c\/th\u003e\n          \u003cth\u003e500 ml\u003c\/th\u003e\n          \u003cth\u003e1 L\u003c\/th\u003e\n          \u003cth\u003e5 L\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e250 ml\u003c\/td\u003e\n\u003ctd\u003e500 ml\u003c\/td\u003e\n\u003ctd\u003e1000 ml\u003c\/td\u003e\n\u003ctd\u003e5000 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eNano \/ pico reefs\u003c\/td\u003e\n\u003ctd\u003eSmall reefs\u003c\/td\u003e\n\u003ctd\u003eMid size reefs\u003c\/td\u003e\n\u003ctd\u003eLarge or multiple reefs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eValue per ml\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eBetter\u003c\/td\u003e\n\u003ctd\u003eGreat\u003c\/td\u003e\n\u003ctd\u003eBest\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eAA250\u003c\/td\u003e\n\u003ctd\u003eAA500\u003c\/td\u003e\n\u003ctd\u003eAA1000\u003c\/td\u003e\n\u003ctd\u003eAA5000\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$22.49\u003c\/td\u003e\n\u003ctd\u003e$30.49\u003c\/td\u003e\n\u003ctd\u003e$44.99\u003c\/td\u003e\n\u003ctd\u003e$139.99\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eDetailed Size Specifications\u003c\/h2\u003e\n  \u003cp\u003eClick a size below to view its full sheet.\u003c\/p\u003e\n\n  \u003cinput type=\"radio\" class=\"aq-tab-radio\" id=\"aq-tab-250\" name=\"aq-spec-tab\" checked\u003e\n  \u003cinput type=\"radio\" class=\"aq-tab-radio\" id=\"aq-tab-500\" name=\"aq-spec-tab\"\u003e\n  \u003cinput type=\"radio\" class=\"aq-tab-radio\" id=\"aq-tab-1000\" name=\"aq-spec-tab\"\u003e\n  \u003cinput type=\"radio\" class=\"aq-tab-radio\" id=\"aq-tab-5000\" name=\"aq-spec-tab\"\u003e\n\n  \u003cdiv class=\"aq-tab-labels\"\u003e\n    \u003clabel for=\"aq-tab-250\" class=\"aq-tab-label\"\u003e250 ml · Nano\u003c\/label\u003e\n    \u003clabel for=\"aq-tab-500\" class=\"aq-tab-label\"\u003e500 ml · Small\u003c\/label\u003e\n    \u003clabel for=\"aq-tab-1000\" class=\"aq-tab-label\"\u003e1 L · Mid\u003c\/label\u003e\n    \u003clabel for=\"aq-tab-5000\" class=\"aq-tab-label\"\u003e5 L · Large\u003c\/label\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"aq-panels\"\u003e\n    \u003cdiv class=\"aq-tab-panel\" id=\"aq-panel-250\"\u003e\n      \u003ch3\u003e250 ml · Nano \u0026amp; Pico Reefs\u003c\/h3\u003e\n      \u003cp\u003eThe starter bottle. Ideal for nano and pico reefs, or for trying the Aragonite system before committing to a larger jug.\u003c\/p\u003e\n      \u003ctable class=\"aq-specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e250 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eAA250\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eRole\u003c\/td\u003e\n\u003ctd\u003eCalcium (Part A)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eNano and pico reef tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$22.49\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"aq-tab-panel\" id=\"aq-panel-500\"\u003e\n      \u003ch3\u003e500 ml · Small Reefs\u003c\/h3\u003e\n      \u003cp\u003eA practical everyday size for small reef systems with a light to moderate calcium demand.\u003c\/p\u003e\n      \u003ctable class=\"aq-specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e500 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eAA500\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eRole\u003c\/td\u003e\n\u003ctd\u003eCalcium (Part A)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eSmall reef tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$30.49\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"aq-tab-panel\" id=\"aq-panel-1000\"\u003e\n      \u003ch3\u003e1 L · Mid Size Reefs\u003c\/h3\u003e\n      \u003cp\u003eThe best balance of value and shelf life for most established reef tanks with steady coral growth.\u003c\/p\u003e\n      \u003ctable class=\"aq-specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e1000 ml (1 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eAA1000\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eRole\u003c\/td\u003e\n\u003ctd\u003eCalcium (Part A)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eMid size reef tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$44.99\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"aq-tab-panel\" id=\"aq-panel-5000\"\u003e\n      \u003ch3\u003e5 L · Large or Multiple Reefs\u003c\/h3\u003e\n      \u003cp\u003eThe bulk jug for large, heavily stocked SPS systems or hobbyists running several reef tanks. The lowest cost per ml.\u003c\/p\u003e\n      \u003ctable class=\"aq-specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e5000 ml (5 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eAA5000\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eRole\u003c\/td\u003e\n\u003ctd\u003eCalcium (Part A)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eLarge or multiple reef tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$139.99\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhich Size Is Right for You?\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003e250 ml\u003c\/strong\u003e — Nano and pico reefs, or a low commitment way to start the Aragonite system.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003e500 ml\u003c\/strong\u003e — Small reefs with a light to moderate calcium draw.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003e1 L\u003c\/strong\u003e — The sweet spot for most mid size reefs. Best mix of value and freshness.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003e5 L\u003c\/strong\u003e — Large SPS systems or multiple tanks where you want the lowest cost per ml.\u003c\/p\u003e\n\n  \u003ch2\u003eHow to Dose\u003c\/h2\u003e\n  \u003cp\u003eAlways test before you dose. Use a quality calcium test kit, then add Aragonite A to bring calcium into the \u003cstrong\u003e420 to 440 ppm\u003c\/strong\u003e range, raising it no more than about 50 ppm per day. Once you hit your target, dose a small daily amount to replace what your corals consume. Follow the dosing guide on the bottle and adjust to your own test results. Keep calcium, alkalinity, and magnesium in balance by dosing Aragonite A, \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/quantum-aragonite-b-alkalinity\"\u003eB\u003c\/a\u003e, and \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/quantum-aragonite-c-magnesium\"\u003eC\u003c\/a\u003e together, and pick up a reliable kit from our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003ewater testing\u003c\/a\u003e collection.\u003c\/p\u003e\n\n  \u003ch2\u003eFAQ\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003eDo I have to use all three Aragonite products?\u003c\/strong\u003e\u003cbr\u003eFor a thriving reef, yes. Calcium, alkalinity, and magnesium are consumed together and depend on each other. Dosing only calcium will eventually pull the other two out of range.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWhat calcium level should I aim for?\u003c\/strong\u003e\u003cbr\u003eMost reef keepers target 420 to 440 ppm. Test, then dose Aragonite A to reach and hold that range.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eCan I use this in a fish only saltwater tank?\u003c\/strong\u003e\u003cbr\u003eYou can, but the main benefit is for reef tanks with corals, clams, and coralline algae that actively use calcium.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eHow is this different from Quantum Easy E Calcium?\u003c\/strong\u003e\u003cbr\u003eAragonite A is the single calcium component of the three part Aragonite system. \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/quantum-easy-e-calcium-reef-2-part-supplement\"\u003eEasy E Calcium\u003c\/a\u003e is part of a simpler two part approach. Both raise calcium; choose the system that fits how you like to dose.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Quantum USA","offers":[{"title":"250 ml","offer_id":48837684592859,"sku":"AA250","price":22.49,"currency_code":"USD","in_stock":true},{"title":"500 ml","offer_id":48837684625627,"sku":"AA500","price":30.49,"currency_code":"USD","in_stock":true},{"title":"1000 ml (1 L)","offer_id":48837684658395,"sku":"AA1000","price":44.99,"currency_code":"USD","in_stock":true},{"title":"5000 ml (5 L)","offer_id":48837684691163,"sku":"AA5000","price":139.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/Aragonite_A_250mL_Bottle.png?v=1780505869","url":"https:\/\/squeakysaquatics.com\/products\/quantum-aragonite-a-calcium","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}