I don't know what the problem actually is but my Desjardini's dorsal fin is looking bad. I don't know if it's fin rot or not...the guy at my LFS thinks it might be from my clowns picking on him at night because he isn't very aggressive but I've never seen a problem between them and he said there would be cotton looking stuff on the fins and there isn't. He was going to sell me some medicated food but I don't think he'll eat it and I don't want to waste my money on it. I soaked some of his sea veggies in garlic but I don't know if that will help. I haven't seen anymore erosion of the fin in a few weeks but I just want to get more opinions. I don't have a picture of it yet but I can try and get one tonight.