We just had a new 19,000 gallon AGP installed. I finished filling it this past weekend, and as per the dealer's instruction, I shocked it (3 pounds), put in algaecide (10 ounces), and put 5 1" chlorine tablets in our floating chlorinator.
I've tested it each day since, and my test kit is not showing any chlorine reading at all. The water in the tester stays perfectly clear after the drops are inserted.
If it means anything, the PH is just about perfect, according to the same test kit.
Any input will be appreciated. Thanks!