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Raises low pH.
Prevents eye irritation.
Protects equipment and surfaces against corrosion.

Lowers high pH.
Reduces skin irritation.
Helps prevent scale formation on surfaces.

4 in 1 shock.
Clears cloudy water and removes swimmer contaminants*.
Reduces chlorine odor and eye irritation.
Improves filter performance.
Won't impact pH.
Treat and swim in 15 minutes**.
(*) Such as body oils, sweat, lotions and urine.
(**) Test Free Chlorine before swimming to ensure it does not exceed 4ppm.