I was getting rid of the sand in my 10 gallon tank & I found some body parts. Claws and stuff. Freaky lol
Is this normal?

I'm guessing my crab Sean has been molting down there. I didn't dig up anymore because I'm scared I'll disturb him.
I also found another crab (Eric lol) in his shell and buried. But not moving.
No strong smells so I don't think anyone is dead...
Anyway I was going to change out all the sand because I bought the hermitcrabpatch substrate and it's coming today. But I'm scared to bother these crabs. So I guess leave that little area of playsand and replace the rest?
