Try to stand back and post an overall picture of the tank from the front or from a further distance. How old/what size in the snake and what size is the enclosure? As others have already said you need a way to keep one side of the tank at 78-80 degrees and keep the other side at 88-90 degrees. Every heat source you have needs to have a thermostat on it. Make sure you understand the difference between a thermostat and thermometer. The ones you have hanging on each side of your tank are thermometers, they just give you an idea of what the temps are. Many of them are not real accurate. The thermostat is the important part of the setup because they keep you from cooking the snake. The easiest thing I found for my 20 gallon glass set up is 2 under the tank heaters and two thermostats. One side is set at 79 degrees and the other is set at 89 degrees. Once you get a thermostat you should trust them readout on them, that is why you need an IR temp gun. For example. The thermostat on my hot side has to stay set at and shows the temp at 94 degrees yet the glass surface is 89 degrees. The one on my cool side is set at and shows 79 degrees and the glass surface temp is exactly 79 degrees. Depending on what the ambient temps are in the room the snake is in you might need an additional heat source as well. The room mine is in requires a small CHE in the winter but nothing other than the UTH heat in the summer.