I place my probe exactly on my middle shelf of the rack and right in the middle of the flexwatt.
Don't tape the probe head itself down as the tape can trap heat and cause inaccurate readings. And I wouldn't put the thermostat probe into a tub either. You risk the snake moving it or getting water/urine on it, which can cause inaccurate readings to the thermostat and spikes in the temperature.

Temperature reading on the thermostat may differ from actual flexwatt temps. For me, my flexwatt reads exactly 100, my thermostat is set to 91, and my tubs range 88-92.

My rack varies, top being warmest and bottom being coolest. But all tubs are within a temp range of 88-92.



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