My SWG is not producing chlorine, SWG indicated 2200 ppm yesterday and I added 40 lbs of salt yesterday afternoon. This morning SWG still indicates 2200 ppm and is not producing chlorine. I have tested the water with the test kit and it indicates 3400 ppm which should be more than adequate for the SWG to run. Nothing on the SWG to indicate there is a problem except low salt. I do not believe the 2200 ppm reading yesterday was accurate. Several weeks ago I have readings from both the test kit and the SWG that were close to each other. I have added bleach today to keep the FC level up. Any thoughts?