Hydrofarm T-Stat Issue

[satomi325]

Well, I've heard a lot of you guys say that this particular thermostat can be as much as 3 degrees off. I'm beginning to think it's more like 10.

I leave for work at about 10am every day. Usually get home around 5:30. Check my tank. The Accurite says my tank is at 108 freaking degrees. Hydrofarm is at 98. I set it for 93. I'm having a really hard time getting this thing to regulate itself properly... obviously. Which one do I trust here, Hydrofarm or Accurite? I was doing better with the light-dimmer and Accurite (or at least I thought I was). The temperature in the room rises and falls fairly significantly by day and night. I'd have to check to see the exact changes. But, could that be causing the Hydrofarm to overreact?

I got a 20gallon ZooMed. UTH, obviously. One bulb and blacklight on top as well. The probes are buried under about 3/5 or 4/5 of an inch of shredded coco-husk.

Need more info or want pictures, please let me know.

Don't put your thermostat probe in the enclosure. Keep it outside. Some people keep their probes successfully inside, but I wouldn't risk it. The snake could move it off the heating source and create temp spikes.
If it says 98/108 degrees, then the Thermostat shouldn't even be on if it's set to a max of 93. Could your bulbs be making it too hot as well?

As for which to trust more, Hydrofarm or Accurite. Neither. Both aren't very accurate. And the thermostat isn't meant to be used as a thermometer. I've had 4 Accurites and 2 of them were 10 degrees off from one another. The remaining two matched up with my temp gun.
I would invest in a temp gun.