The jug of stabilizer says to add slowly to skimmer while running the pump. Then it says you can't backwash for 24 hours. Yet I keep reading that it takes up to 7 days for the stabilizer to fully dissolve and to wait that long to test your CYA level.

If you can backwash after 24 hours, but have to wait 7 days for it to fully dissolve, then where is it at from hour 25 to the 7th day?