Sustain Summer Shield 1/2 Gal

Sustain Summer Shield Chlorine Extender adds an extra layer of defense to your pool water by maintaining a reserve of chlorine power that activates automatically when sanitizer levels dip—like after heavy pool use or rainfall. This “on-demand” chlorine support helps prevent algae outbreaks and keeps your pool water cleaner, longer.

In addition to its algae-fighting abilities, Summer Shield includes a built-in clarifier that gathers fine particles, making it easier for your filter to trap them and improve water clarity.

What’s unique about Summer Shield is that it forms a beneficial type of combined chlorine—different from the unpleasant kind that causes odors and irritation. When using the full Sustain 3-Part System, what shows up as combined chlorine is actually your Summer Shield level, ensuring your pool stays protected without the drawbacks of traditional combined chlorine.

This product is specially formulated to be used with Sustain 3” General Chlorinating Tablets and Sustain ¾” Shield Energizer Shock Tablets for best results.

*Note: Shield levels can drop due to splash-out and water dilution. To maintain proper protection, have your local Sustain dealer test your Shield level every six weeks. For optimal effectiveness, maintain a concentration between 1.5 ppm and 5 ppm.