Another test at 7pm
Add chlorine to bring FC to 16.
Busy on work and kids' preparation for school, wait too long to do this test.
Last night at around 9pm, I tested the FC to be 14.
This morning, I tested it to be 13.5 with CC at 0.5.
I guess it passed the OCLT.
So I let the chlorine level drop down to 8ppm at around 6pm (still higher than recommend level, so no LC tonight).