I have a pair of misbar clowns. The largest one is just under two inches long, and the smallest is alittle over an inch. The big one as become aggressive towards my orchid dottyback. I mean the stinkin clown hunts the dottyback down and pins it into a corner. This just started a few days ago. It targets the smaller clown, though not as much. Ever experience this? Is my only option to remove the clown?