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Thread: Chlorine level in the winter.

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    Chlorine level in the winter.

    Winter is a long way away, but I am just wondering, if I decide to leave the pool open and uncovered next winter, do I keep the chlorine level the same, or can it go much lower because of the cold?
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

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    Mod Squad JohnT's Avatar
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    Re: Chlorine level in the winter.

    You'd probably want to keep it about the same, but usage should go way down.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Chlorine level in the winter.

    If sunlight is hitting the pool in winter, why does usage go down? I thought it was just the sunlight that broke down the chlorine, but are you saying it is also temperature?
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

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    Mod Squad JohnT's Avatar
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    Re: Chlorine level in the winter.

    Colder water has less biological activity and you probably have zero bather load too. Both contribute to chlorine consumption.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Mod Squad jblizzle's Avatar
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    Re: Chlorine level in the winter.

    What John said ... and what I already wrote ...

    Well, in winter the sun is not quite a strong. Also, when the water is cold, there are less organics for the FC to have to deal with (no bather load, no algae trying to grow, etc).
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Chlorine level in the winter.

    I see. Thanks for the info.
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

  7. Back To Top    #7

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    Location
    Atlanta Ga
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    Re: Chlorine level in the winter.

    When shocking a pool, is the high chlorine level ever high enough to be a health hazard? Is it OK to swim while shocking?
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

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    Mod Squad jblizzle's Avatar
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    Re: Chlorine level in the winter.

    It is generally accepted as safe to swim up to shock level for you CYA level. If you are shocking with FC above shock level and trying to kill stuff ... swimming may not be the best idea.

    If the water is clear and you are close to passing the OCLT and FC is at shock level ... it is probably fine ... may want to rinse you suits etc after.

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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