Zilla Ground English Walnut Shells Desert Blend 100% Natural ground English Walnut shells replicate natural habitats and create an attractive desert environment Will not scratch glass like sand and provides excellent heat-conducting Stimulates natural digging and burrowing behavior and is an excellent heat conductor Ideal bedding depth in enclosure is 1 to 2-inches, remove and replace bedding monthly Ideal for desert dwelling reptiles such as: adult bearded dragons, monitors, desert skinks and uromastyx