Sunday, 11 April 2021

DE won't backwash off my filter

Got a new Pentair Quad filter last year. It is a big one which calls for ten cups of DE. After backwashing it has a large amount of DE caked on filter. The window is cloudy for only a few seconds when backwashing. I emptied 30% of my pool last fall doing a backwash and still caked on when I took it apart.

Am I using bad DE? Is my pump not powerful enough? Are my filters screwed up? (I did initially plumb it backward and ran it for a couple of days. Can't see any tears, and it does...

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