My pool has been driving me crazy this year. I started the TFPC (ABC) method in July of 2013. After getting my high CYA level (300 plus) down and performing the firs SLAM, the pool was a breeze to maintain. I kept my FC around 3-4, occasionally it would dip as low as 2.0 but never saw algae and didn't need to SLAM for over a year.
Fast forward to today, for weeks now I have kept the FC above 8.0! Yesterday's readings (with algae all over the pool floor) were:
I have slammed 4 times in the last 6 months and justed started another. I am getting monkey arms from lugging Chlorine jugs from the pool store!
The main question I am seeking an answer to is: "How is it even possible for algae to bloom with chlorine levels as high as this?"
Admittedly I am not home during the day and I don't brush/vacuum frequently enough. The only other factor is that I replaced my liner last spring and the jets had been removed so maybe they were not aimed correctly for good flow. I adjusted them yesterday as well.