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Thread: Do I need to lower my PH or increase my FC?

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    Join Date
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    Do I need to lower my PH or increase my FC?

    Readings this morning are:

    FC - 4
    CC - 0
    PH - 7.8
    CYA - 60
    Borates 50 ppm

    Thank you,

    Vonda
    23k gallon, IG, plaster with spillover spa, Hayward pump and filter

  2. Back To Top    #2

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    Re: Do I need to lower my PH or increase my FC?

    Quote Originally Posted by VondaP
    Readings this morning are:

    FC - 4
    CC - 0
    PH - 7.8
    CYA - 60
    Borates 50 ppm

    Thank you,

    Vonda
    Your pH is at the high end, so I would recommend lowering it. As far as FC, we would need to know the cyanuric acid level, as that determines the proper FC level.

    EDIT: Opps my bad, you did post the cya. You do need to up the FC. See the chlorine/cya chart in the stickie section.
    Poor Man's Pool
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    Vonda,

    How does your water look?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Most folks would say my water looks great, but I know it can sparkle more.

    Vonda
    23k gallon, IG, plaster with spillover spa, Hayward pump and filter

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    Quote Originally Posted by VondaP
    Most folks would say my water looks great, but I know it can sparkle more.

    Vonda
    Maybe you need to filter a little longer each day. The borates should prevent algae. Still, I would target FC just a bit higher to have a little wiggle room. You should not let the FC drop to less than 2.0 ppm, otherwise you will be flirting with bacteria. This is all assuming the pool is a non-SWG pool.
    Poor Man's Pool
    Doughboy 18 ft round above ground
    7600 gal with center drain
    Pentair sand filter, 1 HP pump
    50 ppm borates
    "I know just enough to be dangerous"
    Pool Calc Ver 1.41 (Excel)

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    JasonLion's Avatar
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    I would try to keep FC at 5 or above at all times. Bringing the PH down a little will also help the chlorine be as effective as it should be. So right now you are just a little low on FC and it is being less effective because of the high PH, so you are right on the edge. When my pool is at an equivalent point the water looks a little "dull".
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Thank you all so much. I added chlorine and muriatic acid. I will test in a bit.

    Vonda
    23k gallon, IG, plaster with spillover spa, Hayward pump and filter

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