Make your hermit crab his very own private beach with Zoo Med Hermit Crab Sand. This substrate is great for hermit crabs who prefer a sandy environment. It’s made with all-natural calcium carbonate and promotes good exercise as well as natural burrowing behaviors like building shelters and hiding spots. Recreating your crab’s natural environment is sure to help him feel right at home. Best of all， no paints or dyes were used in the making of this substrate.