Hi all, I just shocked last night (1st time) at about 9:30 pm based on recommendation of service dept. guy who stated do it one week after indoctrination and the fact that we had a pool full of kids day this past Thursday (and several kids in since first day). The pool is less about two weeks old, plaster stillbeing brushed 3+ times a day. I also have a floatee opened half way with 3 trichlor pucks in it as opposed to skimmer recommended by service dept. Pump is still running 24/7. This is based on 18563 gallons:
CH-off chart (3.0+)
CC- of chart (6.0+)
ALK- right about 20 or a little lower.
FWIW, this is using a $11. Swimline test kit from Namco pool store.