UTH Duct Tape

I have the uth with the thermostat probe, then i put the tub on top of the uth here is a pic i just took as best as i can:

Here is the gap between my tub and the uth, the black thing is the thermostat probe:
http://i50.tinypic.com/ei7fpk.jpg

Ok. Attaching it will help a lot. With plastic that thin and a substrate like paper towels you might even be able to set the thermostat to 90 and call it a day. The less a UTH has to heat through (air/plastic/substrate) the better (as long as it is regulated by a thermostat)

So when i get the tape, seal the edges, set the thermostat to 90 and see what happens, just annoying my thermometer saynig 89 and my temp gun saying 83 :/

But thanks for your help! :)

Yes you want the UTH making solid contact with the bottom of the cage.

Another thing to remember is that the thermometers/temp guns we use in the hobby (not lab grade equipment that costs $$$$$) usually has at least an error of +/- 2 degrees so when using 2 seperate devices the error compounds

for example say you have a digital thermometer that is reading 2 degrees over and a temp gun that is reading 2 degrees under. Both are working within the manufacturers specs, but you now have a 4 degree gap in your readings. In cases like that I usually will split the difference between the readings, or test it with my thermostat probe which is extremely accurate.

Ok thanks a lot for the help!

Very very appreciated Aaron!