I have 3 new cichla kelberi and they are very aggressive with eachother or at least one of the most truly aggresive cichlids I’ve ever kept and one of them is extra extra aggressive and so I put 2 Oscars and catfish in to calm the aggression and it’s worked slightly and gotten better but still very aggresive any idea how to help? The tank is 90 gallons with an fx6 usually at 82 degress just because they are new to the tank.