The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
I've noticed that any change I make to the tank - adding new fish, even moving decorations, can trigger some fighting and posturing among my fish. It's like they have to re-establish the hierarchy, or something.
It will probably settle down soon. Are they actually doing damage, or just rushing at each other?