Yea the biggest one recorded was football sized.
Lol we got green sand one time and the hair on the hermit crabs all turned green. But hermit crabs LOVE climbing, we took the net thingy outa the trunk of my mom's old car that was to help things stay in and cut it up and hung it in their tank...
the pincher will grow back. we had 14 hermit crabs but we had a snow storm and the electricity went off and they died. Im sure he will change his shell they like changing at night they feel more secure. Wetting the shell w/ water might help they like the moisture.