Quote Originally Posted by calmolly1 View Post
My tubs are slightly recessed on the bottom and I use Flexwatt. Do you think I need to lift it further? Temps in tubs are spot on 90 over Flexwatt


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Is flexwatt easier/cheaper? I've had two uths die on me this year and I want dependibility.
Don't know about lifting. I'd say yeah. Physics wise air flow is important. One of my tubs started to melt!