Pooltec Fall-Winter Treatment provides long lasting protection from fall to spring to keep water continuously clean, clear, and algae-free. With Pooltec, little or no chlorine is required even in warmer states such as CA, AZ, TX, and FL. The product"s powerful protection lasts throughout the non-swim season and no pool cover is required. Salt generators can be turned off during this season to save cell life and replacement expense. With Pooltec, pool owners have the assurance that pool water will stay protected with virtually no attention to regular pool maintenance. Unlike chlorine winterizing kits which provide limited protection until temperatures fall, Pooltec protection"s is unaffected by heat or evaporation.