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Thread: Closing time question, want to get this right.

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    JamesR's Avatar
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    Closing time question, want to get this right.

    Been using the methods here all season and the pool was spotless. Liquid bleach only, baking soda......no additives or other unwanted junk. Pool was sparkling.
    I have waited till now to close because the temps are dropping and so are the leaves. So, what is a good recommendation for chemical levels for closing? I have a mesh safety cover, so debris and a bit of sunlight do get through.
    Do I throw in some algecide? (which i had not put in the pool all year). Do I add any stain/scale preventer? Chlorine level before putting the cover on? Anything else special to do? Last year I put a winter floater in that I bought at the local pool store. Poked a bunch of holes in it, tossed it in the water. It was a combo algecide and stain/scale preventer I believe. Seemed to give me decent results upon opening as I had almost no algae for the 1st time in many years.
    Right now I am at
    4ppm Cl2
    225 hardness
    80 alkaline
    7.8 pH
    40 CYA
    28K gallon, raised beam, plaster/ceramic color quartz with attached spa. TF-100 test kit
    Hayward 1.5HP super pump, DE4800 DE filter, Hayward inline chlorinator w/3" tabs (off)
    Pool: 2 floor drains, 2 skimmers, 3 floor returns, 2 wall returns, 3.5' deep > 8' deep
    Spa: 2 floor drains, 4 jet returns

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    Mod Squad tim5055's Avatar
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    Re: Closing time question, want to get this right.

    Not that I'm not willing to answer the questions, check this out

    Pool School - Closing an In Ground Pool

    Glad our methods are working out for you. Don't be a stranger over the winter - that's when we have the party starts here!
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    JamesR's Avatar
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    Re: Closing time question, want to get this right.

    Tim,
    Thanks for the link. "PolyQuat".... is Algecide-60 the same or suitable?
    28K gallon, raised beam, plaster/ceramic color quartz with attached spa. TF-100 test kit
    Hayward 1.5HP super pump, DE4800 DE filter, Hayward inline chlorinator w/3" tabs (off)
    Pool: 2 floor drains, 2 skimmers, 3 floor returns, 2 wall returns, 3.5' deep > 8' deep
    Spa: 2 floor drains, 4 jet returns

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    Mod Squad tim5055's Avatar
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    Re: Closing time question, want to get this right.

    I'm straying into Chem Geek's area, but Polyquat is poly[oxyethylene-(dimethylimino)-ethylene-(dimethylimino)-ethylene-di-chloride]

    According to it's MSDS , te one you are looking at is Poly[oxyethylene(dimethyliminio)ethylene (dimethyliminio)ethylene Dichloride

    So, it looks the same to me, but they list the otehr 40% as "Trade Secret", so I'm not 100% sure what else is in there. I would think if it had metals or really bad stuff they would be listed.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    duraleigh's Avatar
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    Re: Closing time question, want to get this right.

    Seems like over the years, we have had good success by just saying "polyquat 60". As long as it has that somewhere on the label, it is the correct stuff.

    There is another, cheaper kind (I can't remember...I don't use algaecide) that if you search on this forum, you will find. The consensus has always been that the polyquat 60 is a much better product.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Closing time question, want to get this right.

    The cheaper one is sometimes called Algaecide 40 or words to that effect. It's a linear quat, most commonly Alkyl dimethyl benzyl ammonium chloride (ADBAC). It's less expensive, but can foam especially when there is more aeration. It also breaks down faster from chlorine so has a more noticeable increase in chlorine demand.

    Algaecide 60 is usually Polyquat but you can check the ingredients to be sure (full chemical name given in an earlier post).
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Mod Squad tim5055's Avatar
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    Re: Closing time question, want to get this right.

    Quote Originally Posted by chem geek View Post
    Algaecide 60 is usually Polyquat but you can check the ingredients to be sure (full chemical name given in an earlier post).
    I just want to hear you pronounce it!
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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