I had my convicts in a mixed breed tank, and I recently transfered them to a tank of their own. In the mixed tank I had a pleco and no issues. I introduced a royal pleco into the convict only tank and my royal is now all torn up. The royal is about an inch longer than the convicts, my params and temp are good, any ideas why im having aggression probs? From what I read, I heard the royals are supposed to be pretty aggressive themselves. Any comments greatly appreciated.