https://www.wagtopia.com/products/estes-spectrastone-shallow-creek-gravel6565841829982Estes Spectrastone Shallow Creek Gravel12.91//cdn.shopify.com/s/files/1/0078/5589/8676/products/46395-1613155320.jpg?v=1621043917//cdn.shopify.com/s/files/1/0078/5589/8676/products/46395-1613155320_large.jpg?v=1621043917USDInStockGravel264052375646Capped Discount264009384030Fish Tank Decor264347943006Freshwater Fish264347975774Saltwater Fish262180864094The Fish ShopSpectrastone shallow creek pebble is an ideal substrate for fresh water and marine tanks. shallow creek is an inert stone that will not affect pH.