Cichlid aggression prevention is a very important topic when it comes to these tropical freshwater fish. If certain cichlids are allowed to be bullies in the tank this can cause undo stress on the other fish and may cause a rise in disease and death. That would not be good! So probably the best way to avoid conflict between your fish is to make sure that you have lots of cichlids in the aquarium. It seems like a strange concept but if you put in a lot of cichlids they won't have enough space to establish territories and the result can be peace in the tank with less aggression. Believe it or not, this concept works!
Within the African cichlids natural habitat, they are aggressive by nature and it is not uncommon to see them chasing each other around. Or you may see them peck at each other's fins or may appear to be fighting face to face. This is their normal action and behavior but if you notice that a single fish is constantly being picked on, then you will want to pay close attention. The peace of the tank can disappear quickly and the fish could get sick or die and sadly this can easily spread sickness and death throughout your aquarium.
Here is some advice to help you prevent cichlid aggression if this type of behavior becomes apparent in your tank:
If a particular cichlid keeps chasing other fish away from a particular area this is a good sign that it has established a territory to protect. You can eliminate this aggression by re-arranging the decorations in your tank, thus taking away the bullies area, which levels the playing field again.
If it continues to happen, it's a good possibility that you may need to add some more fish because obviously there is enough space to establish territories. Never just add the fish and walk away. Cichlids are very smart fish and they will immediately begin to pick on the newbie. Add your fish when you do a water change and when you change the water, move the decorations around. By the time the stress of the water change wears off, they probably won't even