Hello my turtle is almost 23 years old and he's 21". Lately I discovered that although he stays in the water for most of the time, but his shell becomes dry and kinda flaky. For the past week, I have been feeding him homemade jelly shots because he rarely wants to eat veggies and also because I saw sign of pyramiding. Anyway, when I was cleaning him today and dry him off, I found out on both sides of the turtle there are some parts that looks like it peeled off or it broke off idk?? It's kinda pinkish. What do you think that is? I'll provides you some pictures. And also at some moments I caught him stretching his legs out and they seem tense (also provide the picture). Pls help me out! Thankyou.
Info: I forgot to mention that he recently has a wound on his the downside of his leg because he scratch it by himself.