In larger baths of water (I am using a half-filled 4.75 gallon container), the temperature only fluctuates ~0.25C from the setpoint, as measured by the sensor.

In larger baths of water (I am using a half-filled 4.75 gallon container), the temperature only fluctuates ~0.25C from the setpoint, as measured by the sensor. I think the large quantity of water makes the change in temperature very gradual.