Everytime i change the water for my turtle . He likes to stay in the water longer to play . I put this rock underwater for him to just sit on . And right after i change the water, he tries to go under the rock or something . He tries moving it around and pushes it . And once he put his head under and started moving it back and forth . It's like he's scratching his head with the rock .
Does this happen to anyone else's turtle ? Why does he do that ?

