{"title":"ONE DAY SALE! September 30, 2025","description":"","products":[{"product_id":"esv-kalkwasser-calcium-hydroxide-1lbs","title":"ESV Kalkwasser, Calcium Hydroxide - 1LBS NO LONGER AVAILABLE ON OUR SITE - ARTICLE RETIRÉ DE NOTRE SITE","description":"\u003cp\u003eTHIS ITEM IS NO LONGER IN STOCK OR AVAILABLE. ALL SPECS AND PRICING ARE OUTDATED AND PROVIDED FOR REFERENCE ONLY. PAGE REMAINS ACTIVE FOR INFORMATIONAL PURPOSES ONLY.\u003c\/p\u003e\n\u003cp\u003eCET ARTICLE N’EST PLUS EN STOCK NI DISPONIBLE. TOUTES LES SPÉCIFICATIONS ET LES PRIX AFFICHÉS NE SONT PLUS À JOUR ET SONT FOURNIS À TITRE RÉFÉRENTIEL SEULEMENT. LA PAGE RESTE ACTIVE À DES FINS D’INFORMATION.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eKalkwasser is the proven standard for maintaining calcium concentration and alkalinity in closed reef aquaria. The calcium provided is directly used by calcifying organisms, and the hydroxide ions provided readily convert dissolved CO2 into bicarbonate and carbonate ions, which are also directly used by calcifying organisms. The net result is no ionic imbalances in the aquarium water, which can occur through the prolonged use of other calcium supplements, such as calcium chloride.\u003c\/p\u003e","brand":"ESV","offers":[{"title":"Default Title","offer_id":40187550171251,"sku":"101-DISC","price":16.89,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/kalk.jpg?v=1758035933"},{"product_id":"esv-kalkwasser-calcium-hydroxide-3-5lbs","title":"ESV Kalkwasser, Calcium Hydroxide - 3.5LBS","description":"\u003cp\u003eKalkwasser is the proven standard for maintaining calcium concentration and alkalinity in closed reef aquaria. The calcium provided is directly used by calcifying organisms, and the hydroxide ions provided readily convert dissolved CO2 into bicarbonate and carbonate ions, which are also directly used by calcifying organisms. The net result is no ionic imbalances in the aquarium water, which can occur through the prolonged use of other calcium supplements, such as calcium chloride.\u003c\/p\u003e\n\u003cp\u003eThis item may require additional shipping and handling fees that will automatically be added to your cart.\u003c\/p\u003e","brand":"ESV","offers":[{"title":"Default Title","offer_id":40187550531699,"sku":"102","price":39.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/kalk_f23edb2c-b3b8-4c49-a77f-aded53f34b5a.jpg?v=1758035933"},{"product_id":"esv-b-ionic-calcium-buffer-2-part-concentrate-system-2-x-1-gallon","title":"ESV B-Ionic Calcium Buffer 2-part Concentrate System (2 x 1 gallon)","description":"\u003cp\u003e\u003cstrong\u003eB-Ionic Calcium 2-part Buffer \u003c\/strong\u003eis the original, unique, easy to use, two-component liquid supplement system. When using equal volumes of each component, the aquarist can easily maintain calcium and alkalinity levels with no mixing powders, disruption of ionic balance, or addition of organic chemicals.\u003c\/p\u003e\n\u003cp\u003eIn addition to supplying highly concentrated calcium and carbonate alkalinity required for calcification, B-Ionic Calcium Buffer System also provides all other important major, minor, and trace elements in the proper ratios to duplicate the composition of synthetic seawater. As a result, B-Ionic Calcium Buffer System will help restore inorganic ions lost from protein skimming and help maintain the ionic balance of the aquarium water.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eConcentrated solution - \u003cstrong\u003eAdd water to fill\u003c\/strong\u003e\u003c\/p\u003e","brand":"ESV","offers":[{"title":"Default Title","offer_id":40187550892147,"sku":"155","price":49.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/ESV_20B-Ionic_20Calcium_20Buffer_202-part.jpg?v=1758035935"},{"product_id":"esv-b-ionic-magnesium-32-fl-oz","title":"ESV B-Ionic Magnesium 32 fl oz.","description":"\u003cp\u003e  \n\t\u003cspan id=\"ctl00__pageBody_lblPdDetails\"\u003e\u003cspan id=\"ctl00__pageBody_lblPdDetails\"\u003eThrough the chemical process known as \"ion-pairing\", magnesium ion concentration influences the saturation point for calcium corbonate in solution. In general, the further the magnesium concentration drops from natural seawater levels (1350 ppm), the more difficult it becomes to maintain adequate levels of both calcium and alkalinity. Magnesium also plays an important role in stabilizing pH by interacting with the buffer system of seawater. B-Ionic Magnesium is an easy to use one component liquid supplement which, when used with B-Ionic Calcium Buffer or kalkwasser, will not disrupt the ionic balance of closed marine aquaria. B-Ionic Magnesium does not contain nitrates, phosphates, organics, or chelating agents. B-Ionic Magnesium contains 36,000 ppm magnesium, and one mL will raise one gallon of aquarium water by 10 ppm.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e  \n","brand":"ESV","offers":[{"title":"Default Title","offer_id":40187551940723,"sku":"170","price":17.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/mag-32oz.jpg?v=1758035936"},{"product_id":"esv-b-ionic-magnesium-1-gallon","title":"ESV B-Ionic Magnesium - 1 gallon","description":"\u003cp\u003eThrough the chemical process known as \"ion-pairing\", magnesium ion concentration influences the saturation point for calcium carbonate in solution. In general, the further the magnesium concentration drops from natural seawater levels (1350 ppm), the more difficult it becomes to maintain adequate levels of both calcium and alkalinity. Magnesium also plays an important role in stabilizing pH by interacting with the buffer system of seawater. B-Ionic Magnesium is an easy to use one component liquid supplement which, when used with B-Ionic Calcium Buffer or kalkwasser, will not disrupt the ionic balance of closed marine aquaria. B-Ionic Magnesium does not contain nitrates, phosphates, organics, or chelating agents. B-Ionic Magnesium contains 36,000 ppm magnesium, and one mL will raise one gallon of aquarium water by 10 ppm.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan\u003eThis item may require additional shipping and handling fees that will automatically be added to your cart.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"ESV","offers":[{"title":"Default Title","offer_id":40187552333939,"sku":"171","price":43.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/mag-1g.jpg?v=1758035935"},{"product_id":"esv-granular-activated-carbon-in-bulk-per-pound","title":"ESV Granular Activated Carbon in Bulk (per pound)","description":"\u003cp\u003e   \n\t\u003cspan id=\"ctl00__pageBody_lblPdDetails\"\u003e\u003cstrong\u003eBULK  GAC - ESV's Granular Activated Carbon\u003c\/strong\u003e (GAC) based on bituminous coal provides the best combination of pore size, large particle size, high surface area, low ash, and hardness for chemically filtering aquarium water. In addition, test results indicate no leaching of phosphates. The high hardness level of this carbon prevents the dispersion of particles throughout the aquarium which can occur with softer grades of carbon. The large particle size facilitates water movement through the carbon and helps prevent the removal of planktonic food organisms via mechanical filtration. Usage: 1\/2 cup per 40 gallons (1 cup per 40 gallons for tanks without protein skimmers) replace monthly.\u003c\/span\u003e\u003c\/p\u003e   \n\u003cp\u003e   \n\t \u003c\/p\u003e   \n","brand":"ESV","offers":[{"title":"Default Title","offer_id":40187553382515,"sku":"213","price":12.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/cac-bulk.jpg?v=1758035937"},{"product_id":"instant-ocean-salt-mix-200g-box","title":"Instant Ocean Salt Mix - 200G Box","description":"\u003cdiv\u003eInstant Ocean® Sea Salt is the most carefully formulated and universally preferred sea salt in the world. The #1 choice of hobbyists, public aquariums, and scientific research facilities, Instant Ocean Sea Salt has set the industry standard for quality, consistency, and value for more than 50 years.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e1. Mix Instant Ocean® with ordinary dechlorinated tap or purified water.\u003c\/div\u003e\n\u003cdiv\u003eNOTE: To prepare small quantities, use 1\/2 cup of Instant Ocean per each U.S. gallon of water. Mix as directed.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e2. Stir vigorously to ensure a good mix. Although the Instant Ocean solution may be used immediately, we suggest aerating the water until it achieves oxygen\/carbon dioxide equilibrium.\u003c\/div\u003e\n\u003cdiv\u003e3. Measure specific gravity with an Instant Ocean® Hydrometer. \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eRecommended Specific Gravity Range: 1.020 - 1.024 at 77°F.\u003c\/div\u003e\n\u003cdiv\u003eNOTE: 1.5 lbs of Instant Ocean is formulated to create 5 gallons of saltwater at a specific gravity of 1.022.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e4. Adjust salt level accordingly. If specific gravity is too low, add more Instant Ocean. lf too high, add more dechlorinated water.\u003c\/div\u003e\n\u003cdiv\u003e5. Change 20% of aquarium water every two weeks to maintain optimum water quality.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eUSAGE NOTE: NEVER mix salt in an aquarium containing animals.\u003cbr\u003e\u003cbr\u003e\n\u003cp class=\"\" data-end=\"296\" data-start=\"80\"\u003eWe stand behind the quality and integrity of the products we sell. However, our guarantee applies solely to the product itself—not to its external packaging or shipping container (e.g., bucket).\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"571\" data-start=\"298\"\u003ePlease note that damage to the product’s outer box or packaging may occur during shipping and is not considered a defect. All products are packaged in protective bags to ensure they arrive intact and fully functional, regardless of any cosmetic wear to the outer container.\u003c\/p\u003e\n\u003cbr\u003e\n\u003c\/div\u003e","brand":"Instant Ocean","offers":[{"title":"Default Title","offer_id":40187590770803,"sku":"SKU18244","price":74.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/instant-ocean.jpg?v=1758036089"},{"product_id":"reef-crystals-salt-mix-200g-box","title":"Reef Crystals Salt Mix - 200G Box","description":"\u003cdiv\u003eEnriched formulation. Optimum effectiveness. Formulated specially for use in reef aquariums, Reef Crystals® contains essential ocean reef elements in concentrations greater than those found in natural sea water.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eSpecially formulated for use in reef aquariums – contains essential ocean reef elements in greater concentrations than natural sea water\u003c\/div\u003e\n\u003cdiv\u003eContains extra calcium to ensure stony coral and coralline algae growth, extra trace elements to provide vital nutrients and extra vitamins to support vigorous growth and survival of corals, anemones and other invertebrates in a captive environment\u003c\/div\u003e\n\u003cdiv\u003eNeutralizes trace heavy metals often found in tap water\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e1. Mix Reef Crystals® with ordinary dechlorinated tap or purified water.\u003c\/div\u003e\n\u003cdiv\u003eNOTE: To prepare small quantities, use 1\/2 cup of Reef Crystals per each U.S. gallon of water. Mix as directed.\u003c\/div\u003e\n\u003cdiv\u003e2. Stir vigorously to ensure a good mix. Although the Reef Crystals solution may be used immediately, we suggest aerating the water until it achieves oxygen\/carbon dioxide equilibrium.\u003c\/div\u003e\n\u003cdiv\u003e3. Measure specific gravity with an Instant Ocean® Hydrometer.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eRecommended Specific Gravity Range: 1.020-1.026 at 77°F.\u003c\/div\u003e\n\u003cdiv\u003eNOTE: 1.4 lbs of Reef Crystals is formulated to create 5 gallons of saltwater at a specific gravity of 1.021.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e4. Adjust salt level accordingly. If specific gravity is too low, add more Reef Crystals. lf too high, add more dechlorinated water.\u003c\/div\u003e\n\u003cdiv\u003e5. Change 20% of aquarium water every two weeks to maintain optimum water quality.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eUSAGE NOTE: NEVER mix salt in an aquarium containing animals.\u003cbr\u003e\u003cbr\u003e\n\u003cp data-start=\"80\" data-end=\"296\" class=\"\"\u003eWe stand behind the quality and integrity of the products we sell. However, our guarantee applies solely to the product itself—not to its external packaging or shipping container (e.g., bucket).\u003c\/p\u003e\n\u003cp data-start=\"298\" data-end=\"571\" class=\"\"\u003ePlease note that damage to the product’s outer box or packaging may occur during shipping and is not considered a defect. All products are packaged in protective bags to ensure they arrive intact and fully functional, regardless of any cosmetic wear to the outer container.\u003c\/p\u003e\n\u003cbr\u003e\n\u003c\/div\u003e","brand":"Instant Ocean","offers":[{"title":"Default Title","offer_id":40187590901875,"sku":"SKU18246","price":89.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/reef-crystals.jpg?v=1758036090"},{"product_id":"esv-b-ionic-2-part-calcium-buffer-8-gal-concentrate-4-gal-each-bucket","title":"ESV B-Ionic 2-Part Calcium Buffer 8 gal Concentrate (4 gal each bucket)","description":"\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eB-Ionic Calcium 2-part Buffer is the original, unique, easy to use, two-component liquid supplement system. When using equal volumes of each component, the aquarist can easily maintain calcium and alkalinity levels with no mixing powders, disruption of ionic balance, or addition of organic chemicals. In addition to supplying highly concentrated calcium and carbonate alkalinity required for calcification, B-Ionic Calcium Buffer System also provides all other important major, minor, and trace elements in the proper ratios to duplicate the composition of synthetic seawater. As a result, B-Ionic Calcium Buffer System will help restore inorganic ions lost from protein skimming and help maintain the ionic balance of the aquarium water.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eSpecifications\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003ehighly concentrated calcium and carbonate alkalinity \u003c\/div\u003e\n\u003cdiv\u003emajor, minor, and trace elements \u003c\/div\u003e\n\u003cdiv\u003e1 ml per 4 gallons of aquarium capacity\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eOur recommended starting dose is 1 ml. of each component per 4 gallons of aquarium capacity per day. Maintain alkalinity between 3.0 and 3.75 meq\/liter (8.4 and 10.5 dKH) by testing daily and adjusting dose accordingly. Depending on the degree of calcification occurring in the aquarium, dose may have to be significantly increased over our recommended starting dose. Never add more than 1 ml. per gallon of each component in a 24 hour period, and never allow pH to rise above 8.45. Once the proper dose has been determined for your aquarium, testing your reef tank parameters can be performed less frequently. \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eIf your aquarium tends to run at a higher pH (over 8.45) we suggest you try our B-Ionic Calcium Bicarbonate System. When using kalkwasser in addition to B-Ionic Calcium Buffer System, follow the above procedure but start with 1 ml of each component per 8 gallons of aquarium capacity per day. For more detailed directions please refer to our product label. \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eComponent A - Carbonate Alkalinity: 2800 meq\/liter (7840 dKH). 1 ml per gallon of aquarium water will raise alkalinity by 0.74 meq\/liter (2.07 dKH). \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eComponent B - Calcium Concentration: 54,000 ppm calcium ion. 1 ml per gallon of aquarium water will raise calcium concentration by 16ppm.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eConcentrated solution - \u003c\/span\u003e\u003cstrong\u003eAdd water to fill\u003c\/strong\u003e\n\u003c\/div\u003e","brand":"ESV","offers":[{"title":"Default Title","offer_id":40187770536051,"sku":"158","price":165.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/files\/esv-bulk-8gallon-2-part-can.jpg?v=1758036973"},{"product_id":"esv-granular-activated-carbon-in-bulk-3-5lbs","title":"ESV Granular Activated Carbon 3.5LBS","description":"\u003cp\u003e  \n\t\u003cspan id=\"ctl00__pageBody_lblPdDetails\"\u003e\u003cstrong\u003e ESV's Granular Activated Carbon\u003c\/strong\u003e (GAC) based on bituminous coal provides the best combination of pore size, large particle size, high surface area, low ash, and hardness for chemically filtering aquarium water. In addition, test results indicate no leaching of phosphates. The high hardness level of this carbon prevents the dispersion of particles throughout the aquarium which can occur with softer grades of carbon. The large particle size facilitates water movement through the carbon and helps prevent the removal of planktonic food organisms via mechanical filtration. Usage: 1\/2 cup per 40 gallons (1 cup per 40 gallons for tanks without protein skimmers) replace monthly.\u003c\/span\u003e\u003c\/p\u003e  \n\u003cp\u003e  \n\t \u003c\/p\u003e  \n","brand":"ESV","offers":[{"title":"Default Title","offer_id":40187896463475,"sku":"211","price":49.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/ESV_203.5_20carbon.jpg?v=1758037522"},{"product_id":"esv-b-ionic-nitrate-32oz","title":"ESV B-Ionic Nitrate 32oz","description":"\u003cp\u003eNitrate which is a concentrated source of nitrate in the form of a highly purified calcium nitrate solution.\u003c\/p\u003e\n\u003cp\u003eMaintaining nitrate concentrations slightly higher than natural reef levels has been observed by many aquarists to be beneficial to coral health and coloration. This may be because higher levels of nitrate compensate for the lack of planktonic food organisms and particulate organic nitrogen available to corals in the wild.\u003c\/p\u003e\n\u003cp\u003eBiological assimilation and denitrification converts the nitrate added into carbonate alkalinity, so there is no accumulation of sodium or potassium, which are difficult to test for.\u003c\/p\u003e\n\u003cp\u003eHigher nitrate levels may also assist organic breakdown and prevent hydrogen sulfide in anoxic\/anaerobic areas of rock and sand. When phosphate levels are already high, increasing food input can be problematic when trying to raise nitrate levels because food also imports phosphate. B-Ionic® Nitrate provides a solution by raising nitrate without increasing phosphate. 1ml\/20 gals. of aquarium water adds 1 ppm nitrate\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e","brand":"ESV","offers":[{"title":"Default Title","offer_id":40691921977459,"sku":"221","price":29.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/ESVb-ionicnitrate.jpg?v=1758037983"},{"product_id":"esv-b-ionic-nitrate-16oz","title":"ESV B-Ionic Nitrate 16oz","description":"\u003cp\u003eNitrate which is a concentrated source of nitrate in the form of a highly purified calcium nitrate solution.\u003c\/p\u003e\n\u003cp\u003eMaintaining nitrate concentrations slightly higher than natural reef levels has been observed by many aquarists to be beneficial to coral health and coloration. This may be because higher levels of nitrate compensate for the lack of planktonic food organisms and particulate organic nitrogen available to corals in the wild.\u003c\/p\u003e\n\u003cp\u003eBiological assimilation and denitrification converts the nitrate added into carbonate alkalinity, so there is no accumulation of sodium or potassium, which are difficult to test for.\u003c\/p\u003e\n\u003cp\u003eHigher nitrate levels may also assist organic breakdown and prevent hydrogen sulfide in anoxic\/anaerobic areas of rock and sand. When phosphate levels are already high, increasing food input can be problematic when trying to raise nitrate levels because food also imports phosphate. B-Ionic® Nitrate provides a solution by raising nitrate without increasing phosphate. 1ml\/20 gals. of aquarium water adds 1 ppm nitrate\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e","brand":"ESV","offers":[{"title":"Default Title","offer_id":40691922305139,"sku":"220","price":19.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/6225\/1891\/products\/ESVb-ionicnitrate_a91002c6-b8f8-475d-8b7a-fa51aaa8057e.jpg?v=1758037983"}],"url":"https:\/\/www.reefsupplies.ca\/collections\/one-day-sale.oembed","provider":"Reef Supplies Canada","version":"1.0","type":"link"}