Exo Terra Desert River Bed Sand is a great Substrate to use in any aquatic setting. Ideal for Turtles, Crabs And any other aquatic Animal. This is a Natrual sand with no dyes or chemicals added to it. This Sand is soft and will not hurt the animals like sharp gravels will and in turn will help the animals feel more at home allowing them to dig around to find there food. This can also be used for desert loveing animals as well with the dry set ups.