HCA: Hermit Crab Association

I will do that when I get home tonight. I have tried all different kinds, this time I got the Turbot shells because that is what they are in now, but will definately provide pics later. Thx.

I have three hermit crabs and 7 extra shells in their crabitat. Every time they have changed shells, they always change back to the original one. Just wondering why they do this. I have bought various different types of shells and none of them seem to satisfy my three.