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Thread: How long will high chlorine last

  1. Back To Top    #1

    Join Date
    May 2010
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    How long will high chlorine last

    About two weeks ago i was having some algae growth so I got my FC to shock levels- actually, much higher- they were in the mid 30s at times. Well, I have sparkling clean water, but my FC is still very high (mid 20s) I have not added any bleach in over 2 weeks, and it is hot and sunny here- low 90s. I have a swg that is set at 50% as insurance, and my CYA is close to 70. I would have thought these high levels would have dissipated or burned off by now???

    FC 22
    CC 0
    PH 7.4
    CYA 70
    TA 85
    20x40 In ground Grecian Lazy L- Vinyl
    AutoPilot SWG Dig-220, SC-48
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  2. Back To Top    #2

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    Re: How long will high chlorine last

    Well, your SWG is still adding chlorine. Makes sense to me.
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  3. Back To Top    #3
    Mod Squad woodyp's Avatar
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    Re: How long will high chlorine last

    Kill the SWG for awhile.
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  4. Back To Top    #4

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    Re: How long will high chlorine last

    What % do you normally run your swg? If it's close to 50% then I can see it taking a while to get the fc levels back down. Shut it down or greatly reduce it for a while and see how it goes.
    23x40 freeform w/spa, 28,000 gal. PCC-2000 in-floor cleaning. Pebble Sheen w/flagstone coping. 14' weeping wall, (2) 18" sheer descents. Sta Rite- cart 400 sqft. filter, Intellipro VS pump, 1hp (cleaning)2hp (water feature)Max E Pro's. Easy Touch 8 function w/IPod. Rainbow chlorinator, Paramount Clear O3 (I know, I know), Max-E-Therm 400K heater.

  5. Back To Top    #5

    Join Date
    May 2010
    Location
    Near Nashville TN
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    Re: How long will high chlorine last

    Question- why kill the swg for a while? Is it hurting anything having FC high- I realize fading of liner, etc...but that's not really a concern. I'm afraid if swg is off and this hot sunny weather continues, good ole algae will return. I do keep at 50% normally and it usually runs +/- 6 FC. It will eventually droop down I'd imagine.

    Thanks again
    20x40 In ground Grecian Lazy L- Vinyl
    AutoPilot SWG Dig-220, SC-48
    Hayward Dual speed 1.5 hp pump
    Hayward sand filter
    Blue Diamond Robotic Vacuum
    BBB method BABY!!

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