Those thermostats are worthless IMO. I gave them two chances, only to almost cook my snake.

You should not be using a human heat pad. They aren't made to be run 24 hours a day. Very risky.

I love my Ranco, I got it from www.reptilebasics.com . Not cheap but it works MUCH better than those cheap ones. MGreptiles have been having alot of complaints lately and personally I wouldn't buy from them.