White sand in a earth filtered pool

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E.Collins828
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Joined: Fri 29 Jul, 2022 06:26
My Pool: In ground 18x36/3-8 feet deep
EC 65A Hayward DE filter

White sand in a earth filtered pool

Postby E.Collins828 » Fri 29 Jul, 2022 11:36

I have a gritty white sand like residue on the bottom of my pool. (Unground 18x36 DE filter) it feels like and looks like white sand, not earth. There is no pressure change in the pump, the water is clear, and smells of chlorine. Wife says it’s earth and believes it. So unless I have a hole in some of the flex tubing, which there isn’t one, if it is earth, how is it getting through the filter side of the tank? Also I work at a place that uses a lot of chemicals and 1000’s of gallons of bleach a day, we test for sodium phosphate and sodium carbonate. I’m convinced it is one of these two and not earth. What test kits should I get other than ph, chlorine and the useless sticks to check these levels?


Denniswiseman
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My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: White sand in a earth filtered pool

Postby Denniswiseman » Sun 31 Jul, 2022 15:59

It won't be earth as you would need a leak and then the water pressure coming out would stop it coming in
mknmike
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Joined: Fri 02 Jul, 2021 21:00

Re: White sand in a earth filtered pool

Postby mknmike » Sun 31 Jul, 2022 21:34

Could it be sand from the pool plaster? Maybe an acidic ph is deteriorating the plaster pool liner? Could that be?

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