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Thread: Low fc - bleach or wait on swg

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    Low fc - bleach or wait on swg

    I'm trying to balance things after torrential rains.
    Today's test results:
    Salt - 3800ppm
    FC - 1
    TC - 1
    pH - 7.1
    TA - 70
    CYA - 70

    There's no borate in this town so I'm okay with a pH of 7.1 for the kids until the swg brings that up naturally. (Or is it worth a drive out of town to find borate or washing soda?)
    I set the swg to super-chlorinate. Are we okay waiting for the FC to come back up via swg or should I grab a couple gallons of bleach?

    Thanks!
    26900 gal IG Vinyl (18'x36', 3' shallow end and 8' deep end plus steps)
    sand filter and 2.7hp variable speed timer
    Jandy Ei SWG (2yr old)

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    Mod Squad Bama Rambler's Avatar
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    Re: Low fc - bleach or wait on swg

    pH of 7.1 is fine. I'd use bleach to get back to the recommended FC.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Low fc - bleach or wait on swg

    with a CYA of 70 and nobody swimming your swg will probably be able to increase the FC slowly, make sure to keep it on.
    32x15 IG Borate+Salt, Pentair VS+SVRS, howard swim pure 40 SWG, Pentair 4000 48sqft DE, Mastertemp 300, Electric Pool Cover, Polaris P93, 4 Kids for Aeration, ;)

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    Mod Squad jblizzle's Avatar
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    Re: Low fc - bleach or wait on swg

    Why stress the cell? Just add some bleach to get the FC level correct and dial in the SWG to hold it there.
    Jason, TFP Moderator
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    Re: Low fc - bleach or wait on swg

    Quote Originally Posted by jblizzle
    Why stress the cell?
    excellent point
    Thanks y'all
    26900 gal IG Vinyl (18'x36', 3' shallow end and 8' deep end plus steps)
    sand filter and 2.7hp variable speed timer
    Jandy Ei SWG (2yr old)

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    Richard320's Avatar
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    Re: Low fc - bleach or wait on swg

    Bleach it now. Don't let the algae get a toehold while you wait for the SWG. It will never be able to catch up if that happens.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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