heating a PVC rack with back heat

[Tzeentch]

I just bought my first tub rack.

It's a 5 slot, 32 qt PVC rack from Boa Master.

It uses 12 inch heat tape down the back.

I currently have the thermostat set to 100 degrees and I'm reading about 86 degrees inside the tub.

What is the "typical" thermostat setting to achieve a 90 degree hotspot on the floor of the tub?

And is this even possible using back heat?

[Lucas339]

how long has it been running

[The Serpent Merchant]

it will be different for everybody because peoples rooms are different temperatures. Where is your thermostat probe, and how long has it been running?

[Tzeentch]

I've been adjusting since Sunday, but it's been running at 100 degrees since yesterday.

The probe is taped to the heat tape in the middle of the tape, it's 3 feet long.

I guess the question is, is it realistic to expect the bottom of the tub to get to 90 degree as you would with a UTH, using back heat tape?

[The Serpent Merchant]

how did you secure the probe? with Aluminum tie? if so that might be your problem, as aluminum tape acts like a heat sink and will affect your probes readings