About a week ago, I had about 0.5 of CC. I shocked the pool to 11 ppm, tested the next morning, and the CC was gone. However, about 4 days later the CC is back up to 0.5 (even though the FC never went below 2.5) I was wondering if this is normal, and what to do to prevent it. I would hate to have to shock the pool every week (or more!)
Thanks
Thanks