{"id":4150,"date":"2026-09-20T20:13:15","date_gmt":"2026-09-20T17:13:15","guid":{"rendered":"https:\/\/bluefinpets.com\/product\/seachem-reef-advantage-calcium\/"},"modified":"2026-09-20T22:45:54","modified_gmt":"2026-09-20T19:45:54","slug":"seachem-reef-advantage-calcium","status":"publish","type":"product","link":"https:\/\/bluefinpets.com\/en\/product\/seachem-reef-advantage-calcium\/","title":{"rendered":"Seachem Reef Advantage Calcium"},"content":{"rendered":"<h2>Seachem Reef Advantage Calcium<\/h2>\n<p>Reef Advantage Calcium\u2122 is a non-caustic (pH 8.3\u20138.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater. Calcium and carbonates are essential to all coral growth. If either becomes deficient, coral growth will cease, followed by a rapid decline in coral health.<\/p>\n<p>Reef Advantage Calcium\u2122 also includes magnesium and strontium in amounts proportionate to typical utilization ratios (100:5:0.1, Ca:Mg:Sr). This allows one to maintain these two important elements while maintaining calcium. Unlike limewater (kalkwasser), Reef Advantage Calcium\u2122 does not have a caustic pH and will not deplete magnesium. Used as directed, it will not deplete alkalinity.<\/p>\n<h2>Key Benefits<\/h2>\n<ul>\n<li>Concentrated, powder ionic calcium<\/li>\n<li>Maintains magnesium and strontium<\/li>\n<li>Can be added directly to aquarium<\/li>\n<li>Directions<\/li>\n<\/ul>\n<h2>Directions and Care<\/h2>\n<p>Use 5 g (1 level teaspoon) per 150 L (40 US gallons) twice a week. For precise dosing, use the Seachem Digital Spoon Scale. Dissolve in at least 250 mL (1 cup) of freshwater. Check calcium every 2 weeks and adjust amount or frequency accordingly.<\/p>\n<p>Check calcium level (use Reef Status\u2122 Calcium to test magnesium levels), then follow addition regimen above until calcium is adjusted to 380\u2013420 mg\/L. Each 5 g\/150 L will raise calcium by about 12 mg\/L. Quantity or frequency can be adjusted, but do not exceed 10 g\/150 L per day. Thereafter, use as required to maintain calcium.<\/p>\n<p>After determining the calcium consumption rate, set up a continuous drip system. Use the following formula (or skip the math and use our Dosage Calculator) to determine how much to add to your top-off water: m=vc\/400 (m=grams to add to top off water, v=volume of tank in liters, c=amount to raise calcium in mg\/L). [For reference: 1 gallon=3.8 liters, 5 g=1 teaspoon].<\/p>\n<h2>Storage and Safety<\/h2>\n<p>Keep the container tightly closed in a cool, dry place. Keep out of reach of children and use only as directed on the product label.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Reef Advantage Calcium\u2122 is a non-caustic (pH 8.3\u20138.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater. Calcium and carbonates are essential to all coral growth. If either becomes deficient, coral growth will cease, fol<\/p>\n","protected":false},"featured_media":4149,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"slim_seo":{"title":"Seachem Reef Advantage Calcium - Bluefin Pets","description":"Reef Advantage Calcium\u2122 is a non-caustic (pH 8.3\u20138.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawa"}},"product_brand":[349],"product_cat":[153],"product_tag":[],"class_list":["post-4150","product","type-product","status-publish","has-post-thumbnail","product_brand-seachem","product_cat-marine-aquarium-supplements","first","instock","shipping-taxable","purchasable","product-type-variable","rey-swatches","","rey-swatches--stretch-labels"],"acf":[],"_links":{"self":[{"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/product\/4150","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/comments?post=4150"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/media\/4149"}],"wp:attachment":[{"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/media?parent=4150"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/product_brand?post=4150"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/product_cat?post=4150"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/bluefinpets.com\/en\/wp-json\/wp\/v2\/product_tag?post=4150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}