Since I already have a couple UTH's maybe I can just attach it to the side just above the water level? With a larger tank would a low wattage incandescent bulb work? I was using it in my 10 gallon but it was just drying everything out pretty badly and it was getting a bit too warm in there.

Any suggestions or info on cleaner bugs like springtails or wood lice? Like what would work best with a WTF and is it easy to get them to sustain in the vivarium?