Ok let me just make sure I understand this correctly. First off put the flextap half way under the ten gallon so its coveringing half of the ten gallon then leave the rest hang out the side. Then get some aluminum tape, tape the strips to the bottoms. Get some wood to raise it off the table a bit. then take the probe put it directly on the strip. Now do I put the porbe on the out side of the tank like on the part thats hanging over on the ten gallon. Or on the inside on the very bottom of the tank under the bedding. Then adjust the thermosate until I have the correct temps reading from my thermometer inside my tank. Also should I place the probe on the ten gallon or the 20 gallon. Thanks, and could someone please repond ASAP so I can do this. Thanks guys!!