So after reading All the recommendations, etc they now have a pretty sweet set up with good temp and humidity ranges. After 2 days in the new tank the smallest buried himself completely. I have no idea where he is. It's been just over two weeks and I don't smell anything except the substrate.
So during all this I got a good starter supply of food from hcp, oyster shells, protien and minerals, even a set of barnacles! But the big crab has been hiding under the log for about 5 days with very little movement. I've smoothed the sand, no tracks. The food hasn't been touched

I'm not sure what to do! Bath day is tomorrow, maybe he'll liven up? We did move him to the other side of the cage once while I cleaned the surface and he made a mad dash back under the log.
I'm afraid to get a new crab while I've got a small (possible) molter, ecspecially since the only place to get them here is the pet store chain and they're all bigger than the big one I have...
Any advice? Words of experience or encouragement?? Thanks for your help!