{"product_id":"seachem-reef-buffer-ph-alkalinity-83","title":"Seachem Reef Buffer","description":"\u003cp\u003e\u003cstrong\u003eSeachem Reef Buffer\u003c\/strong\u003e raises and holds reef pH at 8.3 while also lifting carbonate alkalinity, the two numbers that keep stony corals and coralline algae thriving. Unlike plain sodium bicarbonate, it is a blended carbonate and bicarbonate buffer with a higher pK (about 8.6 in saltwater) that is formulated to overcome the organic acids reef tanks produce, so it cannot accidentally overshoot pH to a dangerous level. Browse our full range of \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eadditives and supplements\u003c\/a\u003e and the rest of the \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/seachem\"\u003eSeachem lineup\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin: 16px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eWhy Reefers Use It\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRaises pH and alkalinity together.\u003c\/strong\u003e Lifts pH toward 8.3 and adds carbonate alkalinity in one product.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReef tuned.\u003c\/strong\u003e The higher pK is built to counter the organic acids that drag reef pH down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWill not overshoot.\u003c\/strong\u003e Holds at 8.3 rather than pushing pH dangerously high.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlended formula.\u003c\/strong\u003e Carbonate and bicarbonate salts, not just baking soda.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin: 16px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003eUse 5 g (1 level teaspoon) for every 150 litres (about 40 US gallons) to raise pH by roughly 0.1 unit, which also raises alkalinity by about 0.5 meq\/L. In an established reef, dosing every few days to twice a week is usually enough to hold your target. Do not let alkalinity climb above 6 meq\/L, and never mix Reef Buffer directly with calcium, magnesium, or strontium supplements. Always test pH and alkalinity before and during dosing.\u003c\/p\u003e\n\u003ch3 style=\"margin: 16px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eChoose Your Size\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%; font-size: 0.95em; margin: 6px 0 4px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #E0F7FA;\"\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; padding: 7px 10px; text-align: left;\"\u003eSize\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #B2EBF2; padding: 7px 10px; text-align: left;\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003e50 g\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003enano reefs and occasional correction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003e250 g\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003ea single reef tank, regular maintenance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003e500 g\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003elarger reefs or frequent dosing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003e1 kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003ebig systems and fish rooms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin: 16px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%; font-size: 0.95em; margin: 6px 0 4px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px; width: 38%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003eReef pH and alkalinity buffer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003eTargets\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003epH 8.3 (will not overshoot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003eAlkalinity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003eRaises alkalinity by about 0.5 meq\/L per dose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003eComposition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003eBlended carbonate and bicarbonate salts (pK about 8.6)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003eForm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003ePowder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003eWater type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003eReef and saltwater only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003eDose\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e5 g (1 tsp) per 150 L (about 40 gal), as needed to hold target\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e\u003cstrong\u003eSizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #B2EBF2; padding: 7px 10px;\"\u003e50 g, 250 g, 500 g, 1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin: 16px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-marine-buffer-saltwater-ph-83\"\u003eSeachem Marine Buffer\u003c\/a\u003e for fish-only marine tanks that need pH support without the reef-tuned formula.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003epH and alkalinity test kits\u003c\/a\u003e to track your numbers before and during dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eCalcium, magnesium, and trace supplements\u003c\/a\u003e to balance the rest of your reef chemistry.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-water\"\u003eSaltwater livestock and supplies\u003c\/a\u003e for the rest of your reef.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin: 16px 0 4px; font-size: 1.05em; font-weight: 600; line-height: 1.25; border-left: 4px solid #006064; padding-left: 8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between Reef Buffer and Reef Builder?\u003c\/strong\u003e\u003cbr\u003eReef Buffer mainly affects pH, raising both pH and alkalinity. Reef Builder mainly affects alkalinity and is used to raise alkalinity without changing pH. Many reefers keep both on hand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it in a freshwater or fish-only tank?\u003c\/strong\u003e\u003cbr\u003eIt is made for reef and saltwater systems. For a fish-only marine tank, Marine Buffer is a better fit, and for freshwater you should use a freshwater alkaline buffer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it raise my pH too high?\u003c\/strong\u003e\u003cbr\u003eNo. Reef Buffer is designed to hold pH at 8.3 and will not overshoot to dangerous levels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mix it with my calcium or magnesium supplement?\u003c\/strong\u003e\u003cbr\u003eNo. Never combine Reef Buffer directly with calcium, magnesium, or strontium additives. Dose them separately and keep alkalinity below 6 meq\/L.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"50 g","offer_id":48755912966363,"sku":"674","price":3.87,"currency_code":"USD","in_stock":false},{"title":"250 g","offer_id":48755912999131,"sku":"676","price":7.47,"currency_code":"USD","in_stock":true},{"title":"500 g","offer_id":48755913031899,"sku":"673","price":12.75,"currency_code":"USD","in_stock":false},{"title":"1 kg","offer_id":48755913064667,"sku":"677","price":23.16,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/0674-Reef-Buffer-50-g.png?v=1778229979","url":"https:\/\/squeakysaquatics.com\/products\/seachem-reef-buffer-ph-alkalinity-83","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}