I just got back from the LFS and someone had brought in some discus because they were moving. Two of the employees took some home and one was left. They gave it to me. I have it in a 55 right now I did a fifty percent water change before I put it in and cranked the heater up to 84. He is with three severums, three silver dollars, four giant danios and a channel cat. All fish are smaller than him. I boiled about two cups of peat moss and put it in the filter to lower the pH. Is there anything else I can do? He is very skinny and the guy at the LFS said they had had them 24 hours and they had not eaten, although I guess that is expected. I really want this fish to make it. Please help with any suggestions.