I used to have hermit crabs too. After having different ones over about a one-year period, eventually all of them died off, and since they are pretty expensive for crabs over here (about $10.00 apiece for the ones with painted shells!) We've decided that we're done with them. They are fun to watch, though. We had a big chunk of driftwood in their tank, and they were always all over it. They loved their hermie-caves, too.