I have had them for nine months. I feed them every other day. I put a tiny piece of shrimp pellet in front of each one. I only have one that is eating snails. He is in the refugium now. He is blue, but so tiny I don't think I could get a good pic even, if I had a camera. I had shells in the tank, but it all started when he decided he wanted a snails shell, from then on he started eating my snails. The other two r fine, and only eat the pellets. beats me. apparently I am not the other one who has had problems.