Dirty water returning to pool

Pool pumps, pool filters and the plumbing of
swimming pools. Sand filters, cartridge filters,
fabric filters and alternative filter media.
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Joined: Mon 15 Oct, 2018 15:58
My Pool: 20,000 gallon inground pool with Pentair sand filter

Dirty water returning to pool

Postby norval » Mon 15 Oct, 2018 16:41

When vacuuming the pool all the dirty water is sent back to the pool jets. I have replaced the sand, replaced the spider gasket. The sand stays clean. When I backwash the water is clean. Checked the laterals they look ok,no sand is coming out of the jets.I am not able to clean the Algae from the pool.Help?

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