I had an orange crayfish in my tank for about a month, then one day when i came home and looked in I saw it dead in a cave. When I went in to get it out, it wasn't a dead crayfish, but only its shed skin. I searched the tank and I couldn't find it hiding anywhere, so I gave things time to work themselves out. The crayfish never reappeared, so I'm assuming he was eaten by other fish during the molting period. So I got another one, and I am hoping to avoid what happened last time.. what should i do?:shock: