Hi! My name is Renee, and my daughters just recieved two adorable little hermit crabs this past Tuesday, so, I've been trying to research and learn about them.. Moved them into the new 20 gallon aquiarium I purchased,bought some interesting stuff for inside (new water dishes, crab shack,log).. The bigger one Spongebob, has been sitting on the the saltwater dish all evening, and I have also had to refill the freshwater 2 times tonight... So, what's up with that? Also, he lost a leg tonight! It just fell off!