SubstrateSource colored sands are ceramic coated minerals that have been proven in long-term field performance and accelerated weathering tests. The granules come in various shades and can be easily mixed to create completely new looks. Our ceramic coated sands do not discolor, fade, or leach chemicals like low-quality epoxy coated sands can. SubstrateSource sands are popular for use in various crafts and sand art. Although all of our substrates have been pre-rinsed, we recommend that you rinse once before using to remove any dust particles that may have occurred during shipping. SubstrateSource colored sands are most popularly used in freshwater aquariums and beta bowls. Available in an assortment of colors in 3 pounds, 6 pounds, and 25 pounds.