UPDATE

We went back to that Chinese restaurant yesterday (the buffet is so good) and believe it or not, the little guys had a little dry floating land piece in the tank and one of the turtles was resting up on it. Maybe the employees actually understood what I told her. The turtles looked much happier though, although when my girlfriend asked how I knew they looked happy, I told her they winked at me and gave me a little turtle thumbs up