The BioDudes handcrafted Terra Sahara Bioactive Substrate is made for reptiles such as bearded dragons, uromastyx, leopard geckos, and other desert-dwelling reptiles. This substrate is specifically designed for biomes that can get very dry and arid, but occasionally have minor humidity spikes. Terra Sahara, a one-of-a-kind bioactive substrate, is designed to hold the perfect amount of water while allowing for evaporation, preventing anaerobic bacteria growth, which is a common issue in desert terraria.