Soak DE Filter fabrics in a solution of 1 part DAVIES "FILTER-KLEEN #200" with 4 parts warm water and agitate slightly.  When cleaned, thoroughly rinse off with water.  For sand filters, dilute 1:10 with warm water and add directly to filter.  Allow to work 1-4 hours, depending on mineral severity and drain.  Do not let cleaner solution enter the pool.  Rinse filter thoroughly prior to returning to filter operation.