Posted: Fri Nov 07, 2008 10:50 pm
I'm inclined to think the main problem is that he seriously needs to shed those scutes and some fungus is established underneath the retained scutes. The white unhealthy stuff is almost exclusively on the small older retained scutes, while the newer growth looks healthy, which may be because his lighting has improved recently.
What does his plastron look like?
How loose are those old scutes? They look very loose. When they come off hopefully the shell underneath will be healthy.
Try to help him shed by making sure he basks regularly under good UVB and gets to dry out completely - top and bottom. You may even dry dock him some at night. It's good that you've got him a good bulb - what brand and strength is it?
The very best UVB light comes from the sun. If you can take him outside for some sun that would be great. However, I realize that in our northern hemisphere it's almost winter so depending on where you are, outdoor basking may not be an option right now. Shell problems take a long time to heal, so I'm sure you'll still be dealing with it months from now when it starts warming up, so try to get him into the sun some when it's practical.
When you're taking a turtle out for sun, you have to take precautions that he not overheat or get chilled, that he not get into any ant nests or fertilizers or pesticides, that no dogs or cats get him, and you have to watch him constantly so that he doesn't wander off.
The other thing you can do is make sure he gets food containing vitamin e, which helps a turtle shed. here's a list:
Tomato
Sweet potato
Turnip greens
Blueberries
Apple skin
You might ask your vet about SSD cream (silver sulfadiazine). It's an excellent topical treatment for fungus (or other infection). The difficulty is if the fungus is underneath the retained scutes, the cream can't get to it to do its work. However, it might help in some places and also help prevent any infection from spreading to healthy shell. See what your vet has to say.
SpotsMama