8 months ago I had started a freshwater tank and had 2 angelfish. 1 large marble and 1 smaller silver. The marbled was always picking on the silver but nothing to be alarmed about. It was mainly territorial and an alpha behavior. After awhile, I had separated them because I wanted to start a tank in my daughters room. So, I split them up. The silver got bigger. About 2 months later, I wound up having to put the silver back with the marble and now the silver picks on the marble constantly. Bullying him, just picking on him. I was thinking about going and getting a few more angels to try and stop the silvers aggression. What do I do? I hate to separate them again.