{"product_id":"seachem-reef-calcium-500ml","title":"Reef Calcium 500 ml — Organic Calcium Polygluconate 50,000 mg\/L | Seachem","description":"\u003cp\u003eSeachem Reef Calcium is a concentrated liquid organic calcium supplement at 50,000 mg\/L, based on calcium polygluconate. Designed to maintain calcium levels in reef aquariums without altering the pH, it offers superior bioavailability compared to traditional ionic calcium due to its uncharged organic form, allowing corals to absorb calcium with less energy.\u003c\/p\u003e\n\n\u003ch2\u003e Main advantages\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e Concentrated organic calcium polygluconate at 50,000 mg\/L — high bioavailability for corals\u003c\/li\u003e\n\n\u003cli\u003e No impact on the aquarium's pH\u003c\/li\u003e\n\n\u003cli\u003e Contains neither nitrogen nor phosphorus — does not cause algae growth\u003c\/li\u003e\n\n\u003cli\u003e Provides a source of metabolic energy directly assimilable by corals\u003c\/li\u003e\n\n\u003cli\u003e Prevents calcium precipitation and alkalinity depletion\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e Use in reef aquariums\u003c\/h2\u003e\n\u003cp\u003e Reef Calcium uses chained organic calcium rather than ionic calcium. When an uncharged molecule is absorbed, the coral acquires several calcium atoms along with an easily metabolized carbohydrate, with less energy expended than with ionic calcium. Reef Calcium can be used alone to maintain calcium levels, but it provides superior coral growth when combined with an ionic supplement such as Seachem Reef Advantage Calcium or Seachem Reef Complete. In cases of severe calcium deficiency, perform a water change or use an ionic supplement to restore levels.\u003c\/p\u003e\n\n\u003ch2\u003e Dosage\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e Standard: 1 capful (5 ml) per 80 L (20 US gallons), twice a week\u003c\/li\u003e\n\n\u003cli\u003e Adjustment: Increase the quantity or frequency according to the growth response, without exceeding 3 capfuls (15 ml) per 80 L per day\u003c\/li\u003e\n\n\u003cli\u003e Each 5 ml capful increases calcium by 3 mg\/L\u003c\/li\u003e\n\n\u003cli\u003e Maintain calcium levels between 380 and 420 mg\/L. It is not necessary to exceed 380 mg\/L with this product.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e Manufacturer's precautions\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e Do not mix directly with a carbonate supplement — alternate days or wait at least 30 minutes between doses\u003c\/li\u003e\n\n\u003cli\u003e Excess calcium can accelerate the loss of carbonate alkalinity.\u003c\/li\u003e\n\n\u003cli\u003e Color and clarity may vary from batch to batch.\u003c\/li\u003e\n\n\u003cli\u003e The crystals around the cap are normal and will dissolve when you shake the bottle.\u003c\/li\u003e\n\n\u003cli\u003e Unlimited shelf life\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e Ingredient\u003c\/h2\u003e\n\u003cp\u003e Calcium gluconate. Content per gram: calcium minimum 50 mg, maximum 52 mg.\u003c\/p\u003e\n\n\u003ch2\u003e Available formats\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e 100 ml\u003c\/li\u003e\n\n\u003cli\u003e 250 ml\u003c\/li\u003e\n\n\u003cli\u003e 500 ml\u003c\/li\u003e\n\n\u003cli\u003e 4 L\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e Why choose Reef Calcium from ReefSolution?\u003c\/h2\u003e\n\u003cp\u003e For complete reef calcium management, use Seachem Reef Calcium as a secondary supplement in combination with Seachem Reef Advantage Calcium or Seachem Reef Complete as the primary ion source. Supplement with Seachem Reef Carbonate for alkalinity and monitor your parameters with the Salifert Calcium Test Kit or the Hanna Checker Calcium.\u003c\/p\u003e\n\n\u003ch2\u003e Frequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003e What is the difference between Seachem Reef Calcium and Reef Advantage Calcium?\u003c\/h3\u003e\n\u003cp\u003e Reef Calcium is an organic calcium polygluconate for calcium maintenance with high bioavailability. Reef Advantage Calcium is a concentrated ionic calcium supplement to increase levels. Seachem recommends using Reef Advantage Calcium as a primary supplement and Reef Calcium as a secondary supplement.\u003c\/p\u003e\n\n\u003ch3\u003e Does Reef Calcium cause algae?\u003c\/h3\u003e\n\u003cp\u003e No. Polygluconate contains neither nitrogen nor phosphorus. It cannot cause algae growth in a properly maintained reef system.\u003c\/p\u003e\n\n\u003ch3\u003e Do standard calcium tests detect Reef Calcium?\u003c\/h3\u003e\n\u003cp\u003e Yes. Reef Calcium is a complexed calcium and most tests on the market, including Salifert, detect it correctly.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":38010072465579,"sku":"000116035309","price":19.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/files\/reef-calcium-500-ml-seachem.jpg?v=1773597246","url":"https:\/\/reefsolution.com\/en\/products\/seachem-reef-calcium-500ml","provider":"Aquarium ReefSolution inc.","version":"1.0","type":"link"}