Sodium Bisulfate - pH Down - 50 Lb. Bag filter-width_7 inches and Filbur FC-1495 filter cartridges

and Filbur FC-1495 filter cartridges

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Sodium Bisulfate - pH Down - 50 Lb. Bag filter-width_7 inches and Filbur FC-1495 filter cartridgesThis is a 50 pound bag of Sodium Bisulfate, also known as pH Down. This product lowers pH to an ideal level for swimming and recreation. Helps to prevent eye irritation, cloudy water, and scaling caused by high pH. It also helps chlorine fight bacteria and control algae which keeps your pool looking clear.