i have a heat lamp and uth on my cage as well as a space heater nearby just to keep the room at 80. during the night tho, i shut the light off and the tank drops down to low 70's, high 60's, and I cant get a red bulb or ceramic heat emitter. ive asked this question before and i was told to duct tape cork to the outside of the tank, and i did that, but the duct tape doesnlt stick, no matter how many layers i put on, are there ne oter methods of insulating a glass tank or of keeping the cork on?