https://www.wagtopia.com/products/estes-stoney-river-black-aquatic-sand6565828722782Estes Stoney River Black Aquatic Sand23.21//cdn.shopify.com/s/files/1/0078/5589/8676/products/46400-1613155504.jpg?v=1621042971//cdn.shopify.com/s/files/1/0078/5589/8676/products/46400-1613155504_large.jpg?v=1621042971USDInStockSand264052375646Capped Discount264009384030Fish Tank Decor264347943006Freshwater Fish264348106846Goldish264347975774Saltwater Fish262180864094The Fish ShopStoney River sand is an ideal substrate for fresh water and marine tanks. We use silica quartz sand that will not affect pH.