Jack's Magic After Shock is a great way to quickly reduce your chlorine levels after shocking your pool, minimizing your pool's downtime. Its fast-dissolving granular formula quickly drops your chlorine level back down to safe levels, enabling you to avoid any measuring and handling messy liquid chlorine. Best of all, this product is made by Jack's Magic, an industry innovator in pool chemicals, allowing you to buy with confidence.
2 oz per 15,000 gallons of water will remove 1 ppm chlorine and 2 ppm bromine.
Add two ounces (1/4 container) per 15,000 gallons of pool water to lower chlorine residual 1 ppm or bromine 2 ppm.
Overdosing will make establishing a chlorine residual difficult following treatment. It is best to use smaller amounts with repeated additions
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