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Thread: adding chlorine to winterized pool

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    adding chlorine to winterized pool

    I have one more long week until my pool is "summarized". I did open the cover slightly yesterday to fill the water to operating level and noticed an abundance of algae. It has been an unseasonably warm winter here in northern NJ. Would it be ok to dump a bunch of bleach into the pool before the pump is up on running so I can get a head start on clearing the water?

    my pool is an 18,000 gallon in ground concrete pool with DE filter, gray colored hydrazzo surface

    Thanks in advance for any advice!

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: adding chlorine to winterized pool

    Don't do it. It's better to wait till it's open and the pump is running before attacking the algae. If the cover is still on you can't even manually mix it so the potential problems could be worse.
    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
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: adding chlorine to winterized pool

    Thanks Bama

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    Re: adding chlorine to winterized pool

    My pool company recommended a "dichlor addition" which I never got around to during the off season. Any idea what they were recommending?

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    Join Date
    Feb 2008
    Flower Mound, TX

    Re: adding chlorine to winterized pool

    Dichlor is just a form of stabilized chlorine. It is often found in bags labeled for shocking purposes. It dissolves quickly and adds CYA (stabilizer). Do not add it or anything though without the pump on and the water circulating. If you do, you can damage pool surfaces.
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
    "It depends."- JohnT

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