The pool should be Energized weekly to reload Sustain Summer Shield Chlorine Extender with reserve chlorine; oxidize any contaminants; and restore and maintain the sparkle to your water. If the pool is lightly used or you live in a cool climate, you may see the Free Available Chlorine (FAC) levels tend to rise above 3 ppm and stay high throughout the week. In these cases, a one-half weekly dose (½ cup per week for every 5,000 gallons of water) will be sufficient.
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