I added D.E. To my Pentair sand dollar sand filter 1/4 cup at a time mixed with water. I poured roughly 1 cup total thru the skimmer when my pressure on my filter increased by 1 psi. After about 2 hours my pressure had risen by about 5 psi and my pump output had drastically dropped so I decided to backwash the filter. Now that I've back washed should I add more DE or let it go as is?
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