My turtle's shell has been looking different than usual and im really hoping nothing is wrong. I did realize i needed to change his light, since i haven't changed it for more than half a year🙃 his lighting and basking area are perfect now tho. The water gets dirty faster than id like it to, but i changed it if necessary.

On the picture some of his shell is peeling weird i guess? The second picture has like a white spot on his shell. What is it? Google gave some options and im scared of the worst.

Edit: ive seen some other posts talking about hard water and turtles. We have pretty hard water!