The reptile store didnt even tell me to get the thermostat actually his words were it wont even get up to 100 degrees that it will probably omly get 80-85 degrees and there not meant to get hot at all when i called to try to figure out why it was only reading 80 on surface yet when i moved substrate and checked glass temp woth temp gun it was reading 90-95 and i have a 300 watt exo terra thermostat no idea how im going to get that probe between glass and mat now seeing as the mats once stick on are not suppose to come off so its starting to look like im going to have to rip itnoff and spend another 45-50 bucks on another mat and evwn if i take ot back they saod for it being used they could only give me 10 to 15 bucks for it i bought it yesterday so good waste of money there lol