I had a cleaner shrimp, fire shrimp, camal shrimp, and coral banded shrimp all together in a 50 gallon, I guess you could call me a shrimpaholic. All of them are living together and have been for almost a year, except just recently my cleaner shrimp died. I really would not recommend a CBS because they chase fish away and chase sleaner shrimp away. My CBS even killed my two month old bamboo shark, who happened to just be sleeping next to him.