I've done the removing the trouble maker and introducing new fish and reintroducing then trouble maker. Only works for a few weeks. The other aros would pick on the trouble maker for a week...then the trouble maker gets comfortable and starts beating the other Fish.
Only thing that worked for me is adding 4-6 silver aros to disperse the aggression. However this only worked while the silvers were in the community. Once the silvers were gone it went back to fighting again...
Only thing that worked for me is adding 4-6 silver aros to disperse the aggression. However this only worked while the silvers were in the community. Once the silvers were gone it went back to fighting again...