HCA: Hermit Crab Association

I can't post a picture. says it is too big. I'm sorry

Thank you for your advice. It is greatly appreciated. Of course 2 days after I posted this question he came out of hiding so I guess he wasn't molting after all. I will try to attach a pic. Hope it shows up. In the top right corner there's a one upper level and in the middle on the right is another ...

I am new to the crab world. I noticed my crab started digging last week. Now the past couple days he is buried. I did not put him in an iso tank. I have heard to have is tanks and I have read they aren't necessary. Regardless, I can't move him now. He has buried on the upper level. The other crabs a...