{"product_id":"reef-code-a-balanced-calcium-alkalinity-system-brightwell","title":"Reef Code A Balanced Calcium \u0026 Alkalinity System Brightwell","description":"\u003cp\u003eIn this review of Reef Code A, the focus is on reef keepers who want a precise, science-backed calcium supplement to support coral and calcareous growth. The 5.28 gal formulation supplies the calcium component of a two-part dosing method designed to match natural seawater ionic ratios when used with Reef Code B, and it is most notable for containing not only calcium but supporting major and trace minerals to sustain reef health. For aquarists seeking a robust, American-made product that simplifies calcium and alkalinity maintenance, Reef Code A delivers consistent, measurable results.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural seawater ratio:\u003c\/strong\u003e Delivers calcium concentrations formulated to mirror natural seawater when dosed alongside Reef Code B to maintain ionic balance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium and multi-mineral supplement:\u003c\/strong\u003e Supplies calcium and essential elements that benefit corals, clams, and calcareous algae for steady skeletal growth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrength advantage:\u003c\/strong\u003e Contains calcium, magnesium, strontium, potassium and trace minerals to provide a more resilient maintenance of aquarium conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured dosing:\u003c\/strong\u003e Clear dosing guidance lets users add 5 ml per 25 gallons every other day to help sustain alkalinity within the recommended range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmerican-made quality:\u003c\/strong\u003e Formulated by a marine scientist and produced in the USA, offering a reliable and scientifically backed option for reef systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eReef Code A is best for hobbyists and experienced reef keepers who already dose two-part systems or who are ready to start precise calcium and alkalinity control. It suits aquariums that house corals, clams, and other reef-building organisms that need stable calcium and carbonate availability.\u003c\/p\u003e\n\u003cp\u003eLess suitable for complete beginners who prefer one-bottle solutions or who are uncomfortable testing and adjusting dosing; those users should consider simpler single-part supplements or automated dosing setups paired with routine water testing.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports reef-building growth with a formula that mirrors natural seawater chemistry.\u003c\/li\u003e\n\u003cli\u003eIncludes major and trace minerals for more complete ionic support than plain calcium salts.\u003c\/li\u003e\n\u003cli\u003eClear dosing instructions that scale to aquarium volume and treatment frequency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRequires use with Reef Code B and regular testing of calcium\/alkalinity, so it is not a standalone fix.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eReef Code A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e5.28 GAL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse\u003c\/td\u003e\n\u003ctd\u003eCalcium component of two-part dosing system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDosing\u003c\/td\u003e\n\u003ctd\u003e5 ml per 25 gallons every other day\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTreatment coverage\u003c\/td\u003e\n\u003ctd\u003e250 ml treats up to 1,250 gallons (when used as directed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComposition\u003c\/td\u003e\n\u003ctd\u003eCalcium, magnesium, strontium, potassium, minor and trace minerals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eReef Code A is a well-formulated calcium supplement for reef aquaria that need accurate, two-part dosing to maintain natural seawater ionic balance. It is good value for hobbyists committed to regular testing and paired use with Reef Code B, because the broader mineral profile supports healthier, more vibrant corals and reduces the guesswork of matching seawater chemistry.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need Reef Code B to use this product?\u003c\/strong\u003e\u003cbr\u003eYes. Reef Code A provides the calcium side of a two-part system and should be used with Reef Code B for balanced carbonate and ionic results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I dose?\u003c\/strong\u003e\u003cbr\u003eFollow the directions: 5 ml per 25 gallons every other day, and adjust based on test results to maintain alkalinity in the recommended range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this safe for all saltwater fish and corals?\u003c\/strong\u003e\u003cbr\u003eWhen used as directed and monitored with routine testing, it is formulated for all marine and reef fish tanks and supports reef-building organisms.\u003c\/p\u003e","brand":"Brightwell Aquatics","offers":[{"title":"Default Title","offer_id":48172235391195,"sku":"B0027JGD5S","price":171.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/714zuTydYzL._AC_SL1500.jpg?v=1769218455","url":"https:\/\/gearmusthave.com\/products\/reef-code-a-balanced-calcium-alkalinity-system-brightwell","provider":"GearMustHave","version":"1.0","type":"link"}