my small red eared slider (a male) is about 1.5 inches and recently he is not looking well. a week ago he was closing his eyes and very rarely opening them but then this i moved to a bigger tank and he was fine with his eyes. today he was floating in the water and his head was hanging from his neck. he is quite fat. but he like doesnt move at all. i put him in a small container with less than half a inch of water so that he can breath and he has uvb light. he also sticks his head out of the water and opens his mouth for a bit and then its like his head falls back in the water. please help me!! yeaterday he was really healthy eating well! i dont know what happpend please help!!! please