My pool has been clear since the beginning of the summer, however, this year it seems like I am losing more FC per day. My CYA is 40. I add enough chlorine to get to the top of the range, 7.0. Doesn’t matter if we get in it or not, when I test in the evening it is usually down to 3.0. It’s been costly adding so much every day. It has been sunny and in the upper 80’s low 90’s with little rain. I decided again to slam the pool since I had a CC of 1.0. Yesterday morning before light, I got a reading of 12.5. This morning another reading of 12.5. This is after leaving the pool at 14 just after dark both times. Is losing 1.5 ppm overnight not passing the overnight test? Is losing 4 ppm per day just due to sun normal?
Thanks so much!
Thanks so much!