As I have just learned this can also be pretty dangerous. I pulled out the tub with the thermostat probe to make some adjustments. When the thermostat senced the dropping temps, it boosted the voltage to my flexwatt. A few minutes later, once everything was set back up (thermostat probe back in another tub, secured to the bottom), the thermostat was reading 93, as it's supposed to, but because I didn't bother the tub with my thermometer, that tub is now reading 97.2, and the thermostat is reading 93.

The thermostat is not allowing the temps to drop in other tubs...So how am i supposed to monitor temps in all of the tubs? I can't assume they're all the same temp because the temps will change as I do mainainence on each one.