Yes, makes sense...the flex will all be the same temp but if you are using more or less per tub then the actual tub temps could be different. (hopefully this makes sense?) (ie. If you use 3 feet for one tub and 2 feet for another tub the temps inside the tub will be different - you just want to make sure the same amount of flex is under each tub so the inside tub temps are the same)Originally Posted by blueapplepaste