Why does the pH on my salt water pool appear to jump up?

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This is usually caused by the electrolysis cell forming “hydroxide” as a by-product during the process of forming chlorine (sanitizer) from the salt in your water. This is a normal part of the electrolysis process and the pH in a salt water pool must be more closely monitored. To help lower the amount raised, try reducing the power to the salt generator cell and set it to run for a longer duration.