Finally i have another discus. He is a marlboro and is in my 20gal with the cobalt...only he is seperated with a divider. Obviously my cobalt has other ideas about sharing his territory. Anyway....i have had him for about 2 weeks now and he is eating happily and swimming around on his side. I have now stepped up my water changes to about 15-20% daily instead of every other day also. 8)