Hermit Crabs inhabit both inland and oceanside environments. Most hermit crabs require a salt bath to thrive and maintain their health. A salt bath should be placed in all hermit crab terrariums, providing a source for their salt requirements. Hermit Crab Salt contains extra calcium which stengthens the exoskeleton and is especially important during molting. Your hermit crabs will soak in the salt bath and collect an additional supply of salt in their shell that they carry with them. Made in the U.S.A.