i am new to taking care of hermit crabs. I adopted a couple for my daughter (they were really for me, since she is only three, but i can justify expenses when it is for my daughter ) while down the ocean in june and have been trying to learn as much as I can about them. i am up to five hermit crabs and have them in a 10 gallon aquarium, with half sand on the bottom and half of that coconut fiber stuff and i keep adding things for them to climb on. anyways, my real point is i was wondering about the set up at the aquarium store i visited today, where i normally buy supplies for my fish tank. I have never seen a hermit crab set up like this the cage was about 4 feet high with lots of plants and branches to climb on, however the entire bottom of the cage was actually about 1 inch of water with lots of extra shells in it. There was no sand or gravel or any other substrate at the bottom. This seems like an odd set up to me, with the little bit of hermit crab knowledge that i have. it really surprises me because they really do have lots of knowledge about the fish and take excellent care of them so I would presume they know what they are doing with the crabs. they had lots of medium and large crabs which seemed quite active in the crabitat. i was wondering what you all though of this set up?