Sophie is in a ten gallon aquarium and Smitty is in a sterilite....however, we have problems getting the temps up high enough in both. I have a screen top for Soph and it's covered w/duct tape (except where the lamp is-and I use the infrared bulb). So, we're not having great luck w/either type enclosure. Actually, it's easier to keep the temp/humidity right in the glass aquarium rather than the sterilite?? Any suggestions? Do you think a thermostat would really solve the problem?