Jack's Magic 02 Safe Shock 2 Lb.

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Jack's Magic O2 Safe Shock Stain Solution #3 can be used as an acid wash pretreatment, making tough copper stains much easier to remove. A  non-chlorine shock (but not a persulfate compound), O2 Safe Shock yields more than 12% active oxygen (3 times more oxygen than persulfate compounds).

Please Note: Not recommended for chlorinated pools, but ideal for biguanide, ozone, and ionization systems.