I'm noticing the percentage setting I have my salt system set at is not producing chlorine in the amounts I want. The setting I used in previous years was great. I have increased the output and can't seem to get beyond 2 ppm. I added liquid last weekend because of cloudy water and don't know if the 2ppm could still be as a result of that. There are no lights flashing on the unit. I'm wondering if the cell might be finished. Does the unit know when it's not producing chlorine, or at a very low amount?