I am having the same prob. I have a 5 in and a 6 in. tiger oscar in a 75 gal. and the bigger one is picking at my little one. I feel so bad. His/her scales are missing on both sides, should I seperate them? I get so mad at the big one 
Sorry about the quality, used my phone. I had to take it fast because she hides all the time now. This is bad I know, the bigger one is not messing with this one anymore though. It is starting to heal. Do you think it will start again

Sorry about the quality, used my phone. I had to take it fast because she hides all the time now. This is bad I know, the bigger one is not messing with this one anymore though. It is starting to heal. Do you think it will start again