Ok I posted this question already last week with no response so I went ahead with my "IDEA" Now I have a situation. I have a 25 qt tub measurements 24"X15"X6". I purchased 3" Flex Watt and have 2' ish running underneath the length of the tub. It's hooked up to a Hydrofarm tsat with an aucrite tmometer. When I connected the Flexwatt to the tstat i placed the tmometer on the Flexwatt as well and the #'s matched for temps. Ok so I've adjusted it overnight and today and cannot get the correct temps. I'm getting max 88 hot 85 cool/ambient with 52% humidity. The tstat is at max set at 107 (108 is auto shut off). Question is should I just go ahead and order 11" flexwatt, if so should this correct the temps or can I get a zoo med uth close by like at the pet store. I will be ordering a T8 by the winter and moving my baby boy as soon as he's ready for the up size. I also have about 3'ish extra Flexwatt not sure if doubling it would give me the right cool temp or cool side. Thanks for reading and hopefully answering