Posted: Tue Aug 31, 2010 6:37 pm Re: Silly question about basking and at night...
If it's really cool in the room your turtle is in, you could cover a good portion of the tank at night to help trap the warmth from the water generated by the heater. It will keep the ambient air temp in the tank warmer. As long as the heater is keeping the water temp at a good, constant temp, however, most turtles will stay in the water to sleep.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-