I want to see if anyone can figure out this problem and come up with a solution. There is a 55 gallon glass vivarium. It cannot be heated with over light or heating because all means of such have been used and because of the depth of the tank even a spot light or a 200 watt ceramic bulb will heat the substrate and as we all know it is the substrate that needs to be heated not the air. Also under the tank heating has been used and do to the amount of bedding that needs to be used a heat pad will not provide enough heat. Extra bedding cannot be removed because it is used to create humidity and the level of that are also extremely low because of the depth and sheer size of this. This person cannot afford to buy another tank so this is the one was have to work with. What would you do to solve this problem? Think of it as a math problem for a herper.