Yes they have this transparent Baskin area. But these boys do not rest there in my presence they prefer to remain outside. I will scratch and find out. Both the turtles are having these spots with similar patternHard to tell from a picture. Looks like mold. Can you scratch it off with your nail?
Does he have a landing dock under the light where he can climb out and bask?
The texture looks like someone peeling off the skin from custard apple. I showed the picture to nearest aquarium store he gave me calcium and told me to keep it in the tank. that calcium will eventually dissolve and will be consumed in 3 monthsYou could also try brushing them with a clean, soft toothbrush. What is the texture like? Maybe @Markw84 can help?
No how do I find outDoes your city have hard water? Have you done any water testing?
@Markw84 have you seen anything like this?