This is a little 2 1/2 gal glass tank that I use for a baby Hog Island boa, with a lid I made out of PVC and aluminum channel. The aluminum provides overkill rigidity to the thin PVC, and also provides a mountpoint for velcro. The light is a 7 watt candelabra bulb. I use a small heat pad, but the light helps alot when the weather is cold. Low wattage and little ventilation keeps humidity reasonable.

Oh, and the pea gravel substrate is a very nice thermal mass for undertank heating.

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Mark