What kind of thermometer are you using? I ask this because, I use a UTH on my hot side and a 100 watt red night bulb in middle of my tank. I didn't have thermometer at the time. When I did get one the temp on my hot was about 110 to 115 :eek: . I bought a better thermometer and a t-stat and all seems fine now. My BP was never settled down and always roaming ( stressed ). I have the UTH and red bulb on the t-stat set at 92.5, with that setting the bulb keeps the ccol side at 82 to 84 and the hot side 92 to 93. I would check and make sure your temps are correct.