Checked my chlorine when I got home, 0 FC
I have a drop test kit and have had to dilute pool water/distilled water 1:2 to test chlorine.

I have a vinyl above ground 7500gal pool.

Added 3 gal bleach then:
Waited 2 hrs and tested everything:
Chlorine (about) 12
pH 8.0
Alk 230
CYA 45
Hardness 0 could not get a reading after 10 drops!