We're building a snake shelf for my 2 snakes, looking something LOOSELY like this: Of course, we'll have to use under-tank heaters. Thing is, they won't actually be able to go UNDER the enclosure, since the shelves are wood. So, I have 2 questions... 1. Which kind of heat would be best? Heating pad? Heat cable? Heat tape? 2. How would the UTH be applied? We can't put it directly on the shelf, because it could burn the wood and possibly the snake. We were thinking of sandwiching whatever heat-source between 2 pieces of glass (attached to shelf, snake can't move it or get inside as it would be sealed), but then how would we replace the pad/chord/tape if needed?