Okay, so here's the deal... I left to go out of town on Monday, as in two days ago. I had five of my crabs up above sand, and I noticed that since Padre's or Jerzy's (not sure which one it is) most recent molt, they had outgrown the extra shells I had for them, and that I should get some more big shells, because he didn't seem to like the other shells I had and was chilling in a shell that was slightly too small. Well I came home this afternoon and when I went to check on my crabs, Padre (or Jerzy) was naked, sitting on the opposite side of the tank from his old shell! I quick got the crab into ISO and grabbed all the shells he could ever want to wear, then went to WalMart and bought some larger shells also. He's been naked for at LEAST five hours now, and is showing no signs of wanting to put a shell on. He just crawls around the tank like normal... except he is dragging one of his legs a little more than normal. Either that or it just looks like it because he doesn't have a shell on anymore.. Anyways, like I said, I was gone so idk if the temp or humidity went wrong while I was gone, but it was right when I came back. The sand is about 7-8", there is a giant salt water "swimming pool," and also a slightly smaller fresh water pool, I feed them shrimp and my special home made "hermit cookies" which have calcium suppliments in there. I have NO clue what is wrong or why my crab went naked, and also Idk why he won't put a shell on! Help!!