Exo Terra Riverbed Sand – Amber (10 lb) – A natural amber-brown river sand substrate ideal for aquatic or semi-aquatic terrariums. The sand’s smooth, fine grains make it comfortable for bottom-dwelling animals and perfect for turtles, frogs, salamanders, or fish that like to dig. In the wild, many aquatic turtles prefer river sand – this substrate mimics that, encouraging natural foraging and basking behaviors. It’s thoroughly washed and has no added dyes. Riverbed Sand also allows water to flow through for filtration in aqua-terrariums and helps anchor aquatic plants. The warm amber color gives a realistic riverbank look while being functional for your pet’s health (easy on soft shells and bellies).