Ive got 5 white cloud minnows. One of the bigger ones seems to be controlling the middle of the 10gal tank. He chases after anyone who gets near him, so they dont school, and the other 4 seems to hangout around other places. Sometimes they get near each other but that one fish always seems to be mean.
If I took out that fish and replaced him with a smaller one, would that solve the problem, or would that just allow some other bigger one to do the same thing?