i have 3 red ear sliders and have had them about 3 years, biggest one is about as big as my hand and the others are little smaller, my question is all the sudden i am noticing that their shells have like a whitish tint and seemed to be breaking or chipping alittle. Do they lose their shells? what does that involve? Should i try to clean their shells with a toothbrush or should I just leave them alone and see what happens?>
If healthy, they should shed individual scuts...each little segment. Eventually, the whole shell should shed, but it isn't going to come off in one big chunk.