No Chlorine?

[MartyW]

I've looked at the best guess chart. I'm still at a loss as to how much shock I need to put in to reach the desired level.

Marty

[Watermom]

In your pool, each quart of 6% bleach will add a little under 1ppm of chlorine. So, when you test your chlorine level, use that as a reference to know how much bleach to add to take your chlorine level back up to 20ppm.