So in the past I have lost a few angel fish due to a strange almost fungus like white fuzz that starts on their fins and then eats their fins up till it gets to their body and then they die? Only my angel fish have been affected by this and all my other fish are fine. This is the second time this has happened to me and I have quarantined them and tried to treat with heat and salt, melafix, primafix and parasite gaurd and nothing seems to stop it. My big male angel has now been floating around on his side and upside down for 2 days and doesn't look like he will pull through? Any know causes or treatments for this? Help please, don't want to loose another.