Posted: Sat Jun 08, 2013 11:08 pm Re: my turt has shell fungus
When I got my YBS, its shell looked somewhat similar. However, what seemed to be fungus was shed off within two days--it turns out that it was some stubborn scutes, from a tough shed.
If you're absolutely sure it's fungus, though, you'll probably end up needing to go to a veterinarian, anyway. If there is some reason why you can't see a doctor, I've heard good things about the "Dr. Turtle" Sulfa Dip, or simply adding some aquarium salt (1/4 of a cup) per 5 gallons of habitat water. Hopefully, it will irritate (and hopefully kill) at least some of the fungus.