Add two discusses to my tank with its one surviving. I added a bigger one and a smaller one than the resident one. The resident one is now bulling the big new discus non stop. It is not allowing it to feed, and have rammed it into the wood so badly that its face is now scared. It is not bulling the small one at all. The poor new (bigger) discus looks bedraggled, but show no fin rot or infections on its scars. It tries to get food and if I gaurd it with the net from the other one (don’t laugh) it eats well. Hate watching this, what am I to do? PS. Though about giving the old one some time in my new SW tank to show who is the top dog, but that may be a bit extreme?