[[[[.......If I could set it lower say down to as low as about 40f I'd be even happier, ......]]]]]
You could at least plug the unit into an exterior thermostat set to turn on at 33 degrees. Then your heater only gets electricity when the air temperature is 33 degrees or lower. Water doesn't get heated until there is a possibility of it freezing. Better than nothing.
You could at least plug the unit into an exterior thermostat set to turn on at 33 degrees. Then your heater only gets electricity when the air temperature is 33 degrees or lower. Water doesn't get heated until there is a possibility of it freezing. Better than nothing.