So my CYA dropped to less than 20 after a long hot summer and now my free chlorine is only 0.5 and total chlorine 1.0. I have added CYA and it is now back up to 40 but my SWG has not raised the chlorine levels in a week. Any suggestions? Just cleaned the cartridge filter and salt cell today. Should I drop in a couple of pucks of chlorine to raise the levels back up. Chlorine level was good all summer with just the SWG cell providing it until the CYA dropped.