I have a 5-6 inch pb and he was fine for the first few weeks, and now he looks to have some sort of fungus on body and fins. Health has gone from swimming and eating to floating upside down alive and breathing at the top now for 2 days. have treated for fungus and done daily water changes w/ treated water and no improvment. If anyone has any suggestions they would be greatly appriciated and i hope i can save him, but it looks like today may be his last.