Just wanted to say I had a cleaner shrimp as well and it munched a bi color sudo-chromis, royal gramma, green chromis, and a cleaner wrasse. I thought I was really doing something wrong with loosing all of these fish until one day I swapped it for a different fish and all of the sudden all of my fish were fine. I even added the royal grama again and haven't lost any other fish since. Crazy huh.