Abstract: A system for electric pH control of saltwater swimming pools, including a pump-assisted circuit for circulating saltwater to and from a swimming pool, means for determining the pH of the saltwater, a pH control cell having at least one pair of electrodes arranges: for electrolytically creating an alkaline and an acidic chemical, the cell including a water flow-through compartment and a species separation compartment, the compartments being separated by a separator structure, a drainage structure, and a controller functionally operative to compare the pH determined or sensed with a desired pH value, apply an electric potential across the electrodes of the cell and control one or both of the potential and electric current supplied to the electrodes as a function of the pH comparison and regulate drainage of an alkaline or acidic species which has been electrolytically generated.