Good morning!
So I started at 3:30 am brushing the pool. I was going to change the filter, but it's too dark to see. I started testing the water around 3:45 am, but before that, last night, I added bleach at 8:00 PM. I took a reading at 9:15 PM and got an FC @ 12.5 ppm. (Yes, then I went to...