So I got a cleaner shrimp for my tank about a month ago. He appears to be healthy and I can't see anything wrong with him physcially. The problem that I have is that he wont come out from my rocks. He just hides under this little ledge. I've tried turning off all the powerheads for a short time to see if that made a difference and he came out ever so slightly. Recently I picked up 3 peppermint and i'm having the same problem with them. What's the deal? Am I doing something wrong? Is there a way to get them to come out?