Give your semi-arid tank tenant the perfect home with Josh's Frogs BioBedding DESERT Bioactive Substrate! This substrate is designed specifically for semi-arid species, such as leopard or fat tail geckos. Simply place 1” of the substrate on the floor of your pet's enclosure, and add a small amount of dechlorinated or R/O water until the substrate sticks together when squeezed. Then, add another 2”-3” of dry Desert BioBedding on top. For full sand/high desert species, apply a 1”-2” layer of Desert BioBedding to the bottom of your enclosure, and add water so that the substrate sticks together when squeezed. Create 4” tall mounds with the damp substrate where humid hides and plants will be, then fill the space between with sand.