HCA: Hermit Crab Association

Hello. I have had my 4 hermies for a little over a year now. I have them in a 20 gallon tank. 2 of the crabs Zeus and Maude are getting much larger than the other 2. They are in large shells. I don't have enough room in my apartment for a larger tank. Is it normal for them to get so big? I do have a...

Thank you so much. 2 of them are sometimes out during the day, but the other 3... who knows what they are up to lol.

Good morning! I am new here. I have 5 crabs that I got last August/October. They have been living in a 10 gallon tank so I recently purchased a 20 gallon tank. My crabs have molted as far as I know. I rarely see them though. I do know they have all switched shells. How do I safely move them to the n...