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Thread: Reducing CYA by draining my vinyl inground pool?

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    Reducing CYA by draining my vinyl inground pool?

    So I am reading the only way to reduce my CYA levels (150) is to remove water. So today I started pumping out the water from the pool and came inside to read a bit. I was going to remove all the water down to the shallow end then refill but got frightened when I read that removing too much water can destroy the liner do to hydrostatic pressure. I removed the water to about a foot under the skimmer and am now refilling.

    If I can't get the CYA out of the water by draining it, how would one do such a thing?
    14x28 inground rectangle vinyl lined pool 3ft on shallow 6ft on deep end.
    Taylor k2006 test kit.

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    duraleigh's Avatar
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    Re: Reducing CYA by draining my vinyl inground pool?

    Do multiple drain/refills. Drain a foot, add a foot, drain a foot, add a foot.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Reducing CYA by draining my vinyl inground pool?

    Quote Originally Posted by duraleigh
    Do multiple drain/refills. Drain a foot, add a foot, drain a foot, add a foot.

    Thanks, that's what I am going to do, better safe than sorry I suppose.

    On the upside today I learned that a kink in your backwash hose creates one heck of a water balloon. My neighbor said it sounded like a gunshot..
    14x28 inground rectangle vinyl lined pool 3ft on shallow 6ft on deep end.
    Taylor k2006 test kit.

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    Butterfly's Avatar
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    Re: Reducing CYA by draining my vinyl inground pool?

    On the upside today I learned that a kink in your backwash hose creates one heck of a water balloon. My neighbor said it sounded like a gunshot..
    holy cow!

    The only other option to reduce the CYA is RO, if it is in your area. Don't see your location in your profile.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Re: Reducing CYA by draining my vinyl inground pool?

    Quote Originally Posted by Butterfly
    On the upside today I learned that a kink in your backwash hose creates one heck of a water balloon. My neighbor said it sounded like a gunshot..
    holy cow!

    The only other option to reduce the CYA is RO, if it is in your area. Don't see your location in your profile.

    Not sure what RO is but I live in Columbus, Ohio. This is our first house/first pool so this is a learning experience for me.
    14x28 inground rectangle vinyl lined pool 3ft on shallow 6ft on deep end.
    Taylor k2006 test kit.

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    Butterfly's Avatar
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    Re: Reducing CYA by draining my vinyl inground pool?

    Well, okay Ohio. I don't think the RO (Reverse Osmosis) treatment is available there.
    So, your only option seems to be the "water dance", aka, drain some, refill some, test; drain some, refill some, test.........

    welcome to the forum
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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