OMG GUYS! I went in this morning to check on my crabbies; I planned to rearrange the plants/accessories and wash all their dishes... The last two days I've noticed on either side of the tank two deep dips in the sand like a crap either came up or went down... (For the last three weeks or so, I've had two guys under the sand.) Well... I found an empty shell from one of the guys buried! I moved the sand around just a little bit and saw a pale, light pink leg!! It moved! (It doesn't stink-to-high-heaven, so I'm pretty sure no one's dead.) But I'm nervous... His shell is empty on the top of the sand, and he's like, just under the surface a little bit... Is that how they do it when they molt? The other guy is still buried and I haven't seen his shell empty or inhabited... I did bury the guy back up, and made sure that in that corner, if/when he comes up he can pick from any shell... (The sand is good consitency, it's warm and humid, and I've got plenty of water, salt and fresh, and plenty of calcium...) Should I be worried?