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Thread: Filling Pool to Close it-Chemical Questions

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    riverheightsnancy's Avatar
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    Aug 2007
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    Flemington, NJ
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    Filling Pool to Close it-Chemical Questions

    Hey Everyone,

    Had severe pool issues all season-leaking-painted surface disintgrating-surface cracks. So after major repairs and a new hi-build epoxy painted surface (over concrete), we are having our pool filed tomorrow and then immediately closing it. Talk about a short swim season! Anyway, any thoughts about chemicals?

    I did the calculations, If we fill to 25,000-30,000 gallons (unsure of exact), would 1 bottle of 1.42 bleach (6%) be enough? My calculations indicate that this is equal to 2.84 ppm roughly for that amount of water adn with no CYA in the water THAT is at shock level. I feel compellled to put more, just because. It doesn't seem like enough! I am going to test for Ph/Alk as soon as the water arrives and attempt to adjust if the water is severely out of whack, but I am feeling tempted to just let it lie if the water is remotely in normal limits. Any thoughts of how to handle this type of situation? I don't want to add to much chlorine, especially if it is not needed. We tend to have metals in our local water and supershocking makes the metals drop out (not on my new surface!). Was thinking about PolyQuat, but I also believe that proper chlorine control makes that unnecessary. Can't wait to open next spring to a brand new surface and being able to use our pool for the first time in 2 seasons!

    Thanks for any insight,

    Lalain
    1960s Original Sylvan Pool
    Concrete
    @ 30,000 Gallons
    Hayward DE Filter
    2 HP Hayward Pump
    BBB believer!

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    Re: Filling Pool to Close it-Chemical Questions

    2 or 3 ppm of chlorine is indeed shock level when you are starting out with a fresh fill and CYA is really and truly zero. Remember that the chlorine won't last very long at all during the day, so it is much better if you add it in the evening.

    I would definitely use polyquat. Because of the sunlight loses, you will not be able to maintain much of an FC level. Polyquat will greatly improve your odds of remaining algae free all winter.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    riverheightsnancy's Avatar
    Join Date
    Aug 2007
    Location
    Flemington, NJ
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    33

    Re: Filling Pool to Close it-Chemical Questions

    Ok, thanks for that about the PolyQuat. I have no choice but to fill, chlorine, and close. The timing is terrible, and it's supposed to be raining tomorrow!
    1960s Original Sylvan Pool
    Concrete
    @ 30,000 Gallons
    Hayward DE Filter
    2 HP Hayward Pump
    BBB believer!

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