Hello,

I found this site last year and it helped greatly with my inground pool. I use a Taylor 2006c testing kit. I just openned my pool last week. It was crystal clear and readings were: FC- 2.5 CC-0 ph 7.6 and stabilizer was 50. All great numbers except chlorine, which I added. Fast forward a few days and I noticed I was getting a cc reading of < .5 which of course tells me that I am battling something. Pool still looks crystal clear but I raised FC to around 20 and have been holding it there for two days or so. I am still getting a cc reading of < .5 and my FC numbers drop significantly and quickly. For example, at 9 AM this morning my FC was 20.5 so I added a gallon of 12.5 % chlorine. I tested the water at 1:30 PM just now and it read FC 15.5! It dropped 8-11 ppm in like 4 hrs??? Is that possible? It is a cloudy rainy day here so sun burn off should be negligible. The cc reading still shows < .5. I am using last years chemiclas and they were stored in my garage over the winter, and it's possible they froze. Maybe my chemicals and no good??? Please help...