So, I've been using a timer for my bp's UTH. I had to monitor quite a bit but, with my wife's help, we got it dialed in fairly well and adjusted when the weather changed. I heard everywhere that I shouldn't rely on a timer and get a thermostat. So, I got a zilla 1,000 watt, set it up and watched it go. For the last 4 days, I have been constantly monitoring it and just can't get it dialed in to where there is a consistent temp on my hot side. It has hot spots of 88 - 91 in one area and not even 2 inches over (still inside the UTH borders ) is only 73 and sometimes lower. I don't want my snake to get too cold or overheat. I haven't changed substrate ( reptibark... yeah, I know but, it is working great for humidity and no problems with my bp, so far) and the substrate is set up the same as I always do. The probe is in the tank, on top of the substrate. I tried under the substrate and that had even worse results. If I put the probe under the tank with the UTH, how in the heck does that monitor what's going on inside the tank with my pet. Is this thermostat making my Zilla UTH go crazy or what? I would think they are compatible. Help!