Those work great! I bought mine there, but keep it outside the tank. The probe wire I have running into tank and under the astroturf over UTH. This allows me to have constant visual indication as to how warm Xaero's belly is when he's warming up. No stress about burns! For constant humidity monitoring I use a separate unit affixed to wall inside tank. For spot checking I use said wall mart unit and place it in different zones to take readings. Temps fluctuate very little.
Ah, wall mart..............they don't even realize they are a herp supply store! Reminds me of way back in the day when True Value Hardware was also True Value Head Shop!! :wink: