Flukers Premium Hermit Crab SubstrateFlukers Hermit Beach Sand Substrate is the key to keeping your hermit crab happy and healthy throughout her entire lifespan. This mixture is a perfectly balanced blend of carefully selected, natural materials, including sand, coconut fiber, salt, and calcium carbonate, to provide a great consistency for burrowing. Probiotic is also added to help with the breaking down of organic waste, keeping your hermit crabs habitat clean. This blend is made to be