Hello. I have kept pirahnas in the past and was very pleased with them. I am currently trying to get a 300 gallon tank and I'm probably going to stock it with pirahnas. When I had them previously I could not successfully keep anything else in the tank with them. I tried plecos, snails, and even shrimp. Nothing would work, as they would be eaten within a week. I was just wondering if anyone knew of a good cleaner fish that could be kept with them. Thanks!