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Andrea WhiteSep 23, 2025
What causes a 'pH LOW' error on my Zodiac Water Filtration Systems?
- EelizabethhowardSep 23, 2025
A 'pH LOW' error on your Zodiac Water Filtration System indicates that the pH is less than 5. Check the pH sensor wiring on the control box and the sensor holder. Also, a faulty connection, calibration error, pH sensor failure, or a dirty sensor could be the cause, so check the sensor's operation. Low alkalinity can also reduce pH, so check and adjust the alkalinity.












