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SpaGuard Spa Sentry
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SpaGuard Spa Sentry

This introduces the easiest way to control pH. SpaGuard's Total Alkalinity Increaser uses additional buffering compound compounds, providing a dual buffering system. Expect up to three full months of clear, pH-stable water.
NOTE: ...
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This introduces the easiest way to control pH. SpaGuard's Sentry uses additional buffering compound compounds, providing a dual buffering system. Expect up to three full months of clear, pH-stable water.
NOTE: Spa Sentry should never be used in spas with plaster finishes or grouting that contains calcium.

Size: 1 quart.