Iv had my setup goin for about 2 months now. I have a Zilla 1000 hooked up to a UTH and have it set for about 93 ish. Somtimes i find that its reading up to 96 and dropping to 89. Somtimes its always bang on. What is making it act like this? Room temp? I have my tstat probe inside the tank, under the sub[cocofiber], with a digital thermometer probe beside it.The hide is also overtop the probes and UTH.