stoney crushed coral is an ideal substrate for marine tanks. We use aragonite that will buffer pH.
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https://www.wagtopia.com/products/estes-stoney-river-crushed-coral-gravel6565846024286Estes Stoney River Crushed Coral Gravel14.99//cdn.shopify.com/s/files/1/0078/5589/8676/products/46404-1613156127.jpg?v=1621044207//cdn.shopify.com/s/files/1/0078/5589/8676/products/46404-1613156127_large.jpg?v=1621044207USDInStockLitter & Accessories262181093470Other Pets Shop263191035998Sitewide Sale262180864094The Fish Shop263308673118WAGWEEK BONUS DEAL DAYstoney crushed coral is an ideal substrate for marine tanks. We use aragonite that will buffer pH.