I own two yellow bellied cooters one of which is older and is healthy, while the other is younger (close to a year old) and has recently had pinkish spots on the top of his shell. I didnt know if it was algea or something else. What is confusing is that they both live in the same tank and everything why one of them would be sick and the other not.
any help on what might be the pinkish/light redish spots on shell would be greatly appreciated. THANKS!
- 10 gallon tank with UV light
- Feeding: aquatic turtle food occasionally lettuce
- Constant temp of 80
- anything else need to know?

