Brand: Jack's Magic SKU: JMAFTER08
Product Overview
Jack's Magic After Shock is an 8-ounce chlorine reducer used when a pool treatment requires the free-chlorine level to be lowered promptly and in a controlled manner. It is commonly paired with Jack's Magic Stain Solution #1, which is normally applied after chlorine has been reduced below 1 ppm. After Shock can also help bring an over-chlorinated pool back toward its normal operating range after shocking, making it useful for residential and commercial pool service.
The concentrated formula is dosed according to pool volume and the amount of chlorine reduction required. As a general reference, approximately 2 ounces lowers chlorine by about 1 ppm in 15,000 gallons, but actual demand can vary with water chemistry and treatment conditions. Test the water between additions rather than adding the entire bottle without measurement.
After Shock is a treatment aid, not a routine sanitizer or stain remover. Follow the current product label and the instructions for the stain-treatment system being used. Keep concentrated pool chemicals separate, maintain circulation as directed, and wait until the water has returned to an appropriate swimming range before allowing bathers to enter.
Key Features
- Reduces free chlorine for compatible pool treatments
- Commonly used before Jack's Magic Stain Solution #1
- Helps correct excessive chlorine after shocking
- Concentrated 8-ounce bottle
- Suitable for residential and commercial pool maintenance
Common Uses
- Preparing water for a chlorine-sensitive stain treatment
- Lowering free chlorine below 1 ppm when treatment instructions require it
- Reducing an elevated chlorine level after pool shocking
Dosage and Use Notes
Approximately 2 ounces reduces chlorine by about 1 ppm in 15,000 gallons. Calculate the dose from the actual pool volume, add according to the current label, circulate the water, and retest before adding more. Water conditions can change the amount required.
Frequently Asked Questions
Does After Shock remove pool stains?
No. It lowers chlorine so a compatible Jack's Magic stain treatment can work under the required water conditions.
Can the whole bottle be added at once?
Only when the calculated dose and current label call for that amount. Test between additions to avoid reducing chlorine farther than intended.
When is the pool ready for swimming?
Wait until the treatment is complete and chlorine, pH, and other water conditions have returned to an appropriate swimming range.
Why Buy Jack's Magic After Shock from Big Frog Supply?
This exact 8-ounce SKU is sized for measured chlorine reduction rather than forcing you to purchase a larger service container. Big Frog Supply also carries the Jack's Magic stain-identification and treatment products commonly used with After Shock, making it easier to assemble a complete, product-specific stain-removal process.
