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Thread: Using Algaecide when winterizing

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    Join Date
    Jun 2014
    Marmora, New Jersey

    Using Algaecide when winterizing

    I live in the North East and it's that time of the year again.. I was wondering if I am wasting my money by putting in winter algaecide. I normally just make sure the pool is balance and then add a winter algaecide and let circulate for a couple of hours prior to covering..

    I have read the a lot of pool owners just super chlorinate or shock their pool prior to closing and that's it. Other will sometimes add a metal treat to try to sequester trace metals and inhibit some potential staining over the winter.

    Thanks in advance
    10,000 gallon white fiberglass pool.. in ground pool

    DE filter,,"Hayward EC65"

    1 hp, Hayward Superpump

  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    DFW, TX

    Re: Using Algaecide when winterizing

    We do recommend using polyquat 60 when closing as an extra precaution.

    More here, Pool School - Closing an In Ground Pool
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    mickey4paws's Avatar
    Join Date
    Apr 2009
    S.E. MI

    Re: Using Algaecide when winterizing

    I've only used Polyquat 60 once in the past 7 years of closing. After it had circulated a while, I tested my PH and it was an odd bright violet color that kind of freaked me out. I'm pretty OCD about my PH, so I decided not to use the polyquat the next year. We've always opened to a clear pool, except for maybe a snake or two and some worms. Usually I just clean the pool really good, balance everything, and shock it and then let it come down a bit, and close.

    But as PoolDV said, it is recommended as an extra precaution. Since people use polyquat 60 with no problems, what happened with me was probably just something that could easily be explained with the odd color of my PH test.
    IG 12' x 39' - 20k Gallons - Vinyl Lined - StaRite Cristal-Flo II 26" Sand Filter - Hayward SuperPump 1 hp - Dolphin Dynamic autocleaner - Lochinvar Energyrite gas heater - Aqua Rite SWCG T-15 - TF100 Test Kit - Skimlite Duallly 9016 pole (great pole)

  4. Back To Top    #4

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    kcindc's Avatar
    Join Date
    Sep 2011
    Fairfax, VA

    Re: Using Algaecide when winterizing

    Using polyquat 60 in the mid-Altantic region is very helpful especially if we get a warm spell in the late fall/early spring.

    It is best to wait for the water to get to and stay below 60 degrees.
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
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