Ok I know it has probably been asked before, but here I go. I am building a 4'x20"x20" wooden cage and I am curious what is the best way to heat the bottom. I have been reading about melamine wood and I plan to use a 11"x17" peice of flexwatt. The question is do I put some acrylic over the top of the heat pad so as though the snake does not come in direct contact with the heat source? Will a single heat source be sufficient or should I use lighting to supplement? If anybody has good advice I would love it. Thanks for the help.