After Shock from Jack’s Magic is a chlorine reducer that is used mostly with the Stain Solution #1 to lower the chlorine below 1ppm. After Shock is a great tool to be used to quickly lower the levels of chlorine after shocking it. It’s great for commercial pools too.
2 ounces removes 1ppm chlorine from 15,000 gallons of pool water. Add product through the skimmer or broadcast across pool surface. Be careful not to add too much!