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Thread: EDTA sequestrant

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    no-mas's Avatar
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    Jun 2008
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    EDTA sequestrant

    Hi folks -
    I'd like to add a metal sequestrant, but already have over 2000 ppb of phosphates in my pool. I don't do anything to remove the phosphates, but am avoiding adding anything that can cause an increase, so I'd like to add sequestrant using EDTA rather than phosphonic acid. Does anybody know the EDTA based sequestrants I should shop for?
    Thanks!
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    JasonLion's Avatar
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    Re: EDTA sequestrant

    Phosphates are a non-issue hyped up by pool stores to sell you products. Sequestrants based on HEDP, phosphonic acid, or phosphonic acid derivatives are far more effective.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Guest

    Re: EDTA sequestrant

    I agree with JasonLion. Stick with a phosphanate based sequesterant1

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    no-mas's Avatar
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    Re: EDTA sequestrant

    Thanks guys -
    I trust your opinion!
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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