My cowfish has this white patches on his fins. No other fish in the tank have anything on them. I’m wondering if this lymphocystis? I’m not sure and I went ahead and treated the tank for Ich. Im just confused. I always thought Ich looked like grains of salt on the body. This doesn’t look like that.. but I don’t know. It got worse almost looked fuzzy and now it looks to almost be gone. The picture was at the start of it. You can see it on the fins. Thanks