Well, I spend alot of time staring at the 75g yesterday. Its inhabitants are 5 Discus and somewhere from 20-25 sterbai cory. This morning I sat and watched the tank again fro some time and noticed that one of the cories had a large "gash" on its head. Then it turned the other way and it had a missing eye!! I can only assume this is from the discus. The tank is heavily planted, I do 3 30-50% wc's a week. They are being fed 4x a day with NLS and bloodworms. Any suggestions? I don't even think I could catch these cories if I tried unless I removed all the plants and wood. I am going to up the frequency of my wc's to help the little guy, he is eating and schooling fine. Is this typical of discus? I guess I just don't think of them as being agressive cichlids. Here is a pic of the 75g, you can see the cories should have plenty of room to hide: