Sustain® Summer Shield Chlorine Extender provides your pool with an extra level of protection against algae. It does this by creating a reserve, or back-up, of chlorine fighting power, that is released on-demand whenever routine sanitizing levels suddenly drop like after a rainstorm or pool party. Used according to label directions, one dose will last all summer (150 days)*.
Sustain® Water Balance Products come in pre-measured dose packs and larger pail packs. Used in accordance with label directions, these quality products allow you to maintain your routine water balance chemical needs from pool opening to closing...all with the SUSTAIN brand that you can trust.
* Sustain Summer Shield levels can be affected by splash-out and dilution (addition of water to the pool). To assure a proper Shield level have your authorized Sustain dealer test your Shield level every six weeks. For Summer Shield Chlorine Extender to be effective, it must measure 1.5 ppm to 5 ppm.