I just noticed after I got home from work today my black angelfish that i have had for awhile looks like the black on it is coming off and fins look kinda beat up...weird. I really think this just happened, I noticed a couple days ago my other big angel was picking on it but they grew up together and never had problems before. I see no problems with any other fish except I had one of my other smaller angels died recently but I didn't notice anything wrong with it. It doesn't look like ick to me. I did a 30% water change (added salt) & tested my water with dip stick test. It looks good. It was solid black and literally looks like the black is coming off. Anyone have any ideas?? I looked over the different fish symptoms of diseases and it doesn't seem to match any of them. This is an established tank, been up and running for 2+ years.