Heating a 10 gallon natural vivarium

So I'm setting up an enclosure that I plan to house a hatchling carpet in. In a spur of the moment decision I decided I wanted to try a natural terrarium and drove all over the county for the materials. I know have it finished but figured out I probably can't heat effectively with a uth because of the amount of substrate. Is there a radiant heat panel small enough for a tank that size?


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I figured a picture might help.


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