HCA: Hermit Crab Association

I think I made a mistake getting 2 big crabs. My biggest doesn't go after the 2 small ones but he goes after the second biggest. I checked up on my second biggest recently, and a couple of his legs don't look sharp! I think he (the biggest) might be hurting my other crabs. Should I separate him? I d...

Okay, he's not molting. I'm still not sure why he was buried though. As soon as I turned off the light they started becoming active

My biggest hermit crab I think is molting. He is under the sand, my sand isn't deep enough right now so I can see where he buried himself. His friends are all by him watching him. Is this normal? How fast should they start molting? I just got him and his friends 2 days ago.

Oops. Just saw the new owners forums. Is that able to be switched?

Hi. I am a beginner hermit crab owner and I would like to know recommended supplies for my hermits. Right now, I want to replace the sand, their bowls, and heating system. I also want to get authentic shells because I heard painted/fake shells are bad. They have calcium sand (which I heard isn't goo...