HCA: Hermit Crab Association

Is it actually beneficial for crabs to have species buddies? I have 6 PPs and 1 E. I'm not necessarily looking to get another crab but if my E needs a buddy I'm willing to get one.

Hi all, first post here :) I got some turbo shells from an aquarium store today. I boiled them and they look great and colorful when wet. When they dried they had this salty film over them. I tried rinsing them again and the same thing happened. Does anyone know how I can remove the salt so they loo...