I have a turbo snail that is obviously dead. I also have 2 scarlet legged hermit crabs that I think have already gone through mini-molting cycles, so I think will be in search of a new shell. My ammonia, nitrites, and nitrates are at 0. Should I leave the dead snail in the tank, and leave it for the hermit crabs to discover? Or is it best to remove it? Thanks.