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Thread: FC Keeps raising

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    FC Keeps raising

    We have gotten the CY finally above 60, and our PH is holding at 7.5, even though our TA is still at 160. We turned on the SWG 2 nights ago, and at first saw our FC raise from 3 to 5. I turned production down to 20% on the SWG, but testing last night showed Ph holding, CYA at 60 and FC was now 9.

    Why does my FC keep raising the way it does, even though we are dropping production on the SWG?

    Admittedly, because of the cool temps Minnesota has experienced, we are usually only using the pool on weekends, but I'm still surprised at the High FC levels.

    Do I just shut down the SWG for a few days until FC drops into normal range, and then start up again?

    Thanks!
    18x36 IG vinyl, Sta-Rite S8D110 DE Filter, Intelliflo VS +SVRS, IC40 SWG, 2 skimmers & 1 main, 1 1/2" plumbing, 2" at pad, Aquabot Turbo T

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    Apr 2007
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    Re: FC Keeps raising

    Why does my FC keep raising the way it does, even though we are dropping production on the SWG?
    Easy enough...your are still putting in more FC than is being consumed. If you cannot lower the percentage any further, cut down on the run time of your SWG.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: FC Keeps raising

    ...sometimes the obvious answer is the most "un-obvious". We completely turned off the SWG this morning and will keep an eye on the numbers. Thanks for assuring my sanity!
    18x36 IG vinyl, Sta-Rite S8D110 DE Filter, Intelliflo VS +SVRS, IC40 SWG, 2 skimmers & 1 main, 1 1/2" plumbing, 2" at pad, Aquabot Turbo T

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