I have a Aqua Logic pool system. Just recently I have received an error code that is from the control board reading zeros for the amps and zeros for the salt content as well. I still have a reading for the volts going to the cell. I was wondering if there is a fix for this besides replacing the expensive control board. Any help would be greatly appreciated.

On another note, I have flagstone around my pool and spa as well that seems to be deteriorating from the salt water. Is there any sort of sealer that will stop this from happening or am I just going to have to replace it in a few years?