I used the iodine just for its shell rot and yes, it had some kind of respiratory disease but unfortunately I couldn't get it to a vet. I'm working in Taiwan and it's very hard to find a knowledgeable vet about sick turtles.

This turtle had been sick for over a year. I believe it had some parasite or virus, since it would often regurgitate some mucus. Temps were high, around 80F, it ate regularly, but never seemed to grow.

I tried my best but really didn't know what kind of disease it had. If you have any info about turtle diseases I'd appreciate it, so as I can do some research.