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Thread: pool store says ch needed to prevent metal corroding?

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    pool store says ch needed to prevent metal corroding?

    water levels
    fc-3
    cc-0
    tc-3
    ph-7.7
    ch-140
    ta-118
    cya-40
    copper-0.25
    temp 76
    24300 gallon inground vinyl

    pool store says need to raise ch to 200 inorder to prevent corrortion from ruining my ladder and heater- copper levels keep rising (slowly) previous owner used frog- but why are they rising- could ch be affecting copper in heater?

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    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: pool store says ch needed to prevent metal corroding?

    Hi and welcome

    That's pool store myth, your pool is vinyl so your level is fine, it won't hurt the heater or other equipment.

    Low PH can cause the heater to corrode, allowing copper to enter the pool Was the PH low for extended periods?

    Did you use any copper based algaecides or HTH Dual Action tablets which contain copper?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Re: pool store says ch needed to prevent metal corroding?

    previous owner used frog- ph was low for a short period of time- but copper # keeps going up as season progresses- eventhough ph has been fairly stable

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: pool store says ch needed to prevent metal corroding?

    Copper could be going up as some old sequestrant wears out. Sequestrant binds to the metals to keep them from staining. It can also prevent them from showing up on the test. Over time the sequestrant wears out, and the metals become active again.

    It is also possible that you are adding something to the pool that contains copper. A number of HTH products contain copper as do a number of algaecides.
    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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