Thank you! That's what I've heard, that it's more dangerous to overheat them than anything, but with how cold it can get, well, I thought'd ask. I'm not worried once winter actually hits, since at -30* the heat'll have to be on. XD It's just this weird period between summer and fall (and spring and summer, really) that's sorta a bear to work with.

How would you recommend placing the heat mat? Underneath probably wouldn't work, because of the false bottom. I've heard about attaching it to the side, but also that it could get too hot for the frogs to be near. Perhaps a smaller heat mat, placed on the side and "beneath" the substrate, so that none, or a minimal amount of the mat itself is visible from the front. And I'm not sure how to make a heat mat stay on the side? Electrical tape, perhaps?