https://www.wagtopia.com/products/estes-stoney-river-jumbo-gems-natural6565833474142Estes Stoney River Jumbo Gems Natural15.73//cdn.shopify.com/s/files/1/0078/5589/8676/products/46406-1613156175.jpg?v=1621043305//cdn.shopify.com/s/files/1/0078/5589/8676/products/46406-1613156175_large.jpg?v=1621043305USDInStockGravel264052375646Capped Discount264009384030Fish Tank Decor264347943006Freshwater Fish264347975774Saltwater Fish262180864094The Fish ShopSpectrastone jumbo gems is an ideal substrate for fresh water and marine tanks. Jumbo gems is an inert stone that will not affect pH.