Glass is a serious PITA to get work for BPs, but if you want to stick with it and not invest a better PVC enclosure or a rack, here's my advice.
- Less substrate. Put down paper or paper towels on the bottom and cover with just a thin single layer of substrate. No more than 1/2-3/4" deep.
- Cover 3 sides with something insulating, like black foam core board or actual insulation foam sheets from a hardware store.
- Cover the screen top with foil. Put your light fixture right on the metal screen on one side of the tank with a 100-watt CHE in it (NO LIGHT) and cut the foil so it just fits in the hole.
Tape the thermostat probe between the glass and the heat pad underneath. Set the stat to 90-95 degrees. Use a heat gun to make sure the paper over the glass doesn't get above 92 after the stat shuts off the heat. Adjust the stat temp accordingly.
Put the CHE on another stat. Install that probe inside the tank about 2/3rd the way down on the hot side. Make sure the probe isn't touching the glass. You can use a little suction cup thingy to stick it to the side. Tape the wire down so the snake can't get behind it or pull it down. Set this stat to 85-88 degrees.
Put an accurite digital temp/humidity meter on the cold side of your tank, not touching the glass. Adjust your CHE stat temps to keep your cold side 78-80 degrees.
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