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Spa Sentry pH Balancing Frequent pH adjustment is not necessary if the spa is using Spa Sentry. Depending on the type of sanitizer used, the pH may drift occasionally and will need adjustment. Brominating or chlorinating tablets tend to rapidly decrease the pH and substantially shorten the life of Spa Sentry. A hand-fed sanitizer is recommended. If the pH drops out of the 7.4 - 7.6 range while on Spa Sentry, adjust according to label or Computer instructions.
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