4 Reasons Not to Run a Salt Chlorine Generator in Cold Water

Electrolysis slows drastically below 60°F The chemical reaction that converts salt into chlorine becomes nearly useless in cold water. You waste electricity and get almost no chlorine output.

Cold operation scales up the cell plates Pumping current through the cell without effective chlorine production accelerates calcium buildup. This scaling shortens the cell’s lifespan.

Manufacturers warn against it Most brands specify not to run the generator below 50–60°F. Some will void your warranty if you ignore this limit.

Temperature shock can crack the cell Cold water hitting a warm cell may crack the ceramic or plastic housing. Turn the generator off, leave the pump running for circulation, and use liquid or tablet chlorine until the water warms up.