"...they are useless below 65 degrees" Certainly not talking about Pool Pilot. The Automatic Temperature Compensation feature allow Pool Pilot to be the only system that WILL operate under cold water conditions. The reason that we can is that while normal operation is not necessary due to there being less activity for chlorine to kill, cold water operation can deplete the cell life. However, the temp compensation will reduce the output of the Pool Pilot automatically down to 1% when the water temp is approx 55 degress. As it warms up, the Purifier % will also increase, proportionally.

No more need to manually add chlorine when it is colder out and the salt system quits. Again, the Pool Pilot will continue operating.