One more question

I was told from a vision tub retailer that I should not have my probe directly on the flex watt.She said I would only get the correct temp from the FW and not the tub Is this right?
Thanks Michae.

That sounds right.. I place my probe on the flexwatt but I use a temp gun to dial in the proper temps. My Helix may read 105 but the tub will be 92.