tanks been getting dirty and only have about 5-6 snails. Just they seem most reef safe so I’ve stuck with them tanks going on 3 months. Wanted to get a shrimp but are they feed safe and would it ever fit it my tank 13.5 fluval evo have 2 small clowns , cardinal , and a royal gramma. If not a cleaner shrimp what do you guys think to beef up the CUC all being reed safe as well thank you