Aqua-Terra's Natural White Aquarium Sand is comprised of all natural acrylic coated high quality sand. The non-toxic and colorfast sand will not alter the chemistry of your aquarium water and there will be no staining or dying of water. Suitable for both freshwater and saltwater aquariums. A fun way to add natural colored sand to create your own unique aqua scape. Natural White Aquarium Sand features grain size ranging from 0 to 0.5 mm.