What would putting the thermostat probe in one of the tubs help with though if I am measuring temps with other devices (not the thermostat). I can adjust the t-stat to whatever I want and it most likely won't match up with what my setpoint is.

My problem is, I am measuring temps with a temp gun and I get 100*+ and then I measure with a probe thermometer and I get 85*. I shoot the temps right next to the probe. I don't think moving the probe for the t-stat will make any difference, I will just have to change my setpoint all around.