Quote Originally Posted by rj1204 View Post
I use 3" (10w) flexwatt. I just followed the same design as Animal Plastic IRIS rack models. That is what was recommended by many breeders I talked to.
IMO 3 inch heat tape provides a large snake with too small of a hot spot to lay on.

I have 4 inch in my 28qt tub rack and it barely keeps up.
I use 3 inch heat tape under 6qt and 15qt tubs on shelves.