Ok so I have a two 20 gallon with screen top, which I taped off to keep in heat..I have I 100 red light bulb with an UTH....Imanging looking down at the tank..the heat lamp is on the right side in the middle and the UTH is in the right hand corner..on both tanks...I cannot achieve the 93 degrees I want on the hot side even though I have a Herstat Pro...I'm very confused about where to put my sensors and I really need some help...How do I use the UTC and the Bulb together??....A phone call Or someone who lives in VA would Help Me a lot..trying to do the best I can, but I'm very frustrated..Thanks..MJ