Ok so I got the biggest Zoomed UTH they make... I believe its 8x18 or so. My tank sits on the ground becuase its so big....should I get 4 pieces of wood to use as legs under it and put the heater directly on the wood or mount it inside by using slate tiles with rubber feet attached and mounting the UTH to the tile & then sealing it? But then that will not allow air flow? How can I make this work without modifing (sp?) my tank....??