thanks guys, I am going to clean the tank later today. he is full grown. he is 8 inches. so a full grown RES is living in a 30 gallon tank. Hate it that we can't get a bigger tank immediately. i think if you do not have proper faculties for your animal you should not have the animal. all my fish have appropriate tank sizes. My parents think some of my tanks are understocked. i feel sorry for animals living in poverty. do you have to cycle a turtle tank with all the ammonia nitrite and nitrate stuff. do you cycle the tank the same way as tropical fish? i am guessing you do. just wanted to make shore.