im a little worried about my RES's shell. when its dry, it gets a little white, but i read that can just be minerals. he has a few areas of concern as well. i worry about the tips of his shell, and whether or not it is a deficiency? he also has a tiny little flake of scute that seems to be flaking off, almost like a scab. i would just like everyones opinion on the overall shel health of Milo. heres a few pics

are the tips of his shell supposed to be whitish yellow?

theres his shell, and that worrisome little flake is on the left

i circled the little flakey scute. does it look like a problem?