Quote Originally Posted by Erie_herps View Post
It's a good rule of thumb to have the heating element no more than 1/3 the size of the enclosure. For this enclosure an 8x12 would work great.
Perfect so would you place the 12x8 heat mat so that it covers most of the Length of the tank so 12 out of the 36 inches

Or

So that it covers the depth completely 12" out of the 12"


Hope this makes sense lol it does in my head haha