Out on no where the other day my angel fish just stopped eatting and hid in the top left corner on the tank by my filter on her side (unsexed I just call it a girl). She will not eat and now she is at the bottom of the tank and she struggles to swim. Her eyes are coverd with a white film and some of her scales don't look normal she is breathing heavily and has one little open wound on her back (very small) her fins are look as if they are slowly being eatin away (no fungus on them like fin rot thought) I'm pretty sure it's not fin rot. I tested my water and had it tested by my fish supplier and they said the water was as perfect as the water could be. It's a 29 gallon with the angel (still small only 2.5 inches long) Cory cat, female betta and a rain bow shark non in witch ever beat up on the angel and all of them are not affected by it they are not sick and acting fine and eatting it's just the angel fish. I keep the water temp at 80 degrees F. I have an air stone and a top fin 60 power filter (I fill filter bags with carbon with carbon and put them in the filter then I also put filter floss and bio balls in the filter as well and it pumps 300 gallons an hour). Please help me find out what this is BEST ANSWER ASAP!!!!!!!!! And yes I M aware my angel fish will most likely die I just want to know what it is and if it will be a big problems with the tank and the other fish.