Why should I use the Sustain Pool Care System? 

Over 20 years of proven performance has shown that the Sustain 3-Part System provides you with an effective and easy-to-use pool care routine. The use of other chlorine products often results in too little or too much chlorine. Sustain, The Intelligent Pool Care System, is formulated and designed to deliver chlorine more evenly than conventional pool care chemical systems. Also, as part of this System, Sustain Summer Shield is the brains of the program. This product actually holds backup chlorine in reserve, and only releases it when it senses your pool's level of chlorine protection (against algae and bacteria growth) has been depleted. (<1 ppm).

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