well I know he has fin rot and it was starting to get rather bad, other than that he has had splotches on his body and his scales did not look good. After 2 days I can see that the scales look better. Those splotches, for lack of a better term, were just discolorations on his body at different spots. I thought it might have been brook but I'm not so sure. Doesn't exactly look like pictures I've seen.