We have had our in ground pool for 7 months now and it seems the CYN A levels are approaching 50. I spent some time to educate myself and understand why this is happening.. I am attributing it to the fact that the chlorine feeder (requires CYN A impregnated tabs) has the been the main source of chlorine in the pool and contributing to this problem. I found a non stabilizing tablet that is CYN A free by Poolife (our local mom and pop hot tub and pool supply store carry). It's branded as Poolife NST. Instructions say to put in the skimmer.. NOT feeder as it's special patented slow release resin. I called the company and they confirmed how to use it. Does anyone have experience with it?
