have a 100 up now that has been running with the following fish for quite some time: 1 male severum, 1 male chocolate, 3 large silver dollars, 1 6in bala, assorted, small catfish/plecs, and 10 neons. There is no aggression between anyone in the tank besides the sev and chocolate, who dont eat anyone or any feeders. The fights have gotten worse as they have aged, both around 6 inch at least now. Recently the severums fins have been getting torn to shreds and I am wondering what to do. I have tried re-arranging the layout many times with no success at all. I would rather not remove either because they are beautiful and cool fish, should I add someone else to maybe help disperse aggression, or what? Thanks