Not much. Backwash when your pressure rises 8-10psi over clean filter pressure. That's about it.
You can add a little DE to a sand filter to help it filter better. More info here:> http://pool9.net/de-test/
Re: Working a Sand Filter for the first time
Not much. Backwash when your pressure rises 8-10psi over clean filter pressure. That's about it.
You can add a little DE to a sand filter to help it filter better. More info here:> http://pool9.net/de-test/
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