I've discovered a way to fairly easily regulate heat and humidity in my BPs enclosure that I thought some of you might find helpful. If this has been covered before, forgive me for repeating the procedure.

I have a standard 40 gallon breeder tank (36" long, 18" wide, 17" high) that I use to house my snake. Shredded aspen substrate. Two hides, one on each end. One 8" diameter water bowl on the cooler side. UT heater on one end and a 150 watt ceramic heat emitter positioned on the screen top in the middle. As seems to be a common problem, I was having trouble keeping the enclosure warm and humid. Then I decided to use plexi glass panels to cover most of the screen top. I cut three separate pieces of plexi; two equal sized panels for each end of the top and a third, smaller piece that fits in the middle. When all three pieces are in place there is a 7 inch square opening remaining which is where the housing for the ceramic heat emitter sits. The plexi is colorless and almost invisible.

I now find that I have no trouble maintaining proper heat/humidity. The hide on the warm side stays around 90 degrees (regulated by a thermostat) and the hide on the opposite "cool" side is in the 80 degree range. Ambient temperature measured about 6 inches up from the bottom is consistently 84-86 degrees. Humidity stays between 55% - 65%. Once every other day or so, when the hygrometer registers less than 55%, I lightly mist the inside of the tank. The infrequent misting combined with evaporation from the water bowl keeps the humidity level just right.

I think the plexi has excellent insulation properties. It is still pretty cold where we live and we keep the thermostat in our house on the cool side. Usually 60 degrees at night and 68 during the day. Also, central heat keeps the air dry in the house........about 30% humidity. This morning the air temp in the room where our BP is housed was 61 degrees but it was a cozy 84 in his tank with 62% humidity. Before the plexi I was using wet towels over the top, and that did work fairly well to keep the humidity up.......but looked so ugly. The plexi panels seem to work even better than damp towels and, as I mentioned, they are practically invisible.