How 
                do I know when it's time to clean my pool filter?
              Normal, periodic 
                rinsing or backwashing will remove most of the dirt from a basically 
                clean filter. However, over a period of time, grease, oils and 
                scale can attack and build up on the elements. When this occurs, 
                you will see build up on the removable elements, short filter 
                runs, reduced circulation and water that does not want to clear 
                up. 
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