HCA: Hermit Crab Association

My one crab percy has changed shells 4 or 5 times since I got him, which was about 3 weeks ago. the other one clawdia has changed twice. I was on an overnight trip and clawdia is in a shell that was once vacant, and percy is in her old one. Is it common for them to change so often?

Hello, this is my first post here and I'm loving the forum.http://www.hermitcrabassociation.com/phpBB/posting.php?mode=post&f=26# I recently got 2 hermits, percy and clawdia. they are in a ten gallon tank with eco earth as substrate. currently they have some nice aquarium plants. Percy always climbs...