Hi there, I brought a second hand tank with fish that I planed to on sell to make room for my current fish. While the owner was catching the Bala, he was chasing it with like the tiniest net available. It was so stressed I didn't think it was going to make it. I have sold most of the bristle-noses, (though they have breed so still have heaps!). The problem is the Bala shark and the paired Angles, being that the Angles are aggressive. I've only seen them fight against themselves, but the Bala shark has missing scales. Which leads me to believe they are harassing it also, and I have never seen the Bala eat. I've had the tank for about a month now, I was hoping they were just re-establishing their territory and it would settle since this had been an established tank for three years prior. I cant see any problems from my end, readings have always been good, water changes done once a week, good water flow and filtration. I want to get rid of them, but don't want to pass on a problem to anyone else. One of the angles has bloodshot eyes, (though I've read that this can be triggered by breading) because the other keeps peeking at it. I don't want things to spiral out of control but other than keeping the water clean and using antibacterial med I'm not sure what I can do? 77G/295L, 1 Bala, 2 Angle, 6 Penguin Tetras, 2 mature BN's and who know how many juveniles Sorry if this is a bit messy, I'm trying to get to bed. Will post more info if needed tomorrow.