I have realized one petsmart/petco does NOT know what the other one is doing...(no offense to people that work there)

But, I have had a heating lamp for my three FBTs for about a year now, I don't have the stand, it just lays on the top of the tank topper. (this might not be best, but I can never find the stand)

I went to petsmart a few days ago and was told this was wrong, that I should have a "heating mat" for them. She explained it by the heat lamp dries them out. Which I understand. But she pointed me out to a "All living things heating mat"

...
It says it's not designed for use with water in any way.

"Or any other situation where there is any water (with or without gravel)"

I have a glass tank that has gravel at the bottom and a pond of water,*they like it like that* and even with that small little pond, all most all of the gravel is moist and I can see water throughout.

So I don't know what to do. Discard it? Try it? I don't really feel comfortable with it, but I want to know what others think