Re: cherry barb
No flushing please. Some Fish are just little bit aggressive to other species. It might have to do with their own character or external conditions such as tank size, hiding splaces, not enough of their own kind, etc...
What size is your tank? How many males and females in each kind of Fish?
30 Gal: Ram Cichlid, 6 Cardinal Tetras, Honey Gourami, Upsidedown Catfish, 2 Otos, Ghost Shrimp, Amano Shrimp, Cherry Shrimp