09-24-2011, 12:09 PM
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Originally Posted by mileshs95
I have a RTS with a blue gourami and they seem to get along ok. they butt heads every once in awhile but are otherwise peacefull. they like to gang up on my angelfish which i am not sure what to do about
This state is very highly stressful to your fish. That means they are spending considerable energy dealing with stress, leaving them with less energy to fight off disease, properly digest food, and interact. In other words, they are continually being weakened.
At the very least, they will die prematurely, that is, with a shorter lifespan that if they were healthy. And worst they will come down with some health issue or contract a disease and cause more issues.
Fish in an aquarium absolutely cannot be healthy and at their best if there is stress being caused by aggression such as you have described. It does not need to manifest itself physically with nips or tears; it can by psychological due to pheromones released by the fish.
As for what to do, they must be separated. Either the aggressor(s) must be removed, or the fish being stressed must be removed.