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Thread: Pool closing - High CYA

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    Join Date
    Jun 2016
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    La Plata, MD
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    Pool closing - High CYA

    Hello pool experts. As I'm getting ready to close the pool, I have a question regarding my water. My CYA levels were rocket high this year (just started BBB this season), and the best I got it down to was 80/90. I've just been maintaining the water at that level. So, with closing and my levels being that high, is there anything different that I need to do? Or is it simply a matter of shocking at that high level before beginning? (I'm looking forward to the partial drain, which will help me get the CYA under more control next season!)

    I have lots more questions, trying to figure all this closing stuff (wish I'd paid attention when the pool company came out last year). But, one step at a time.
    Wendy
    28' octagon, 21K gal, in-ground vinyl pool, single speed 3/4 HP Hayward pump, multi port valve on sand filter, using KS-2006 kit

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    Catanzaro's Avatar
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    Jul 2014
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    Re: Pool closing - High CYA

    Please follow the procedure in the section for closing an IG pool. You will be fine and during the winter months your CYA will also drop a little. Do not shock, but use bleach to bring to shock level and then allow to drift down and add PolyQuat 60. Thanks!
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Frog Mineralizer System (EMPTY) - Hayward Super Pump 2 HP Model # k48m2n111
    Pool Company tests water (NO LONGER) TF-100 TEST KIT
    Date of Build is 11-2013

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    Re: Pool closing - High CYA

    Thanks so much for not including fifteen issues in your post. Learning the issues one step at a time keeps everything in focus.

    Yeah, so bring your pool to the SLAM value for a CYA of 80/90. Than add polyquat 60 (optional but many people report success) and close it up.

    Is your water temp below 60 degrees?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pool closing - High CYA

    Sorry, yes, I know. SLAM, not shock. I just used the wrong terminology.

    No, the waters not consistently at 60 degrees yet. This is the first week it is starting to get cold. So I'm keeping an eye on it and waiting.

    Is the polyquat 60 purchased online or at the pool store?
    Wendy
    28' octagon, 21K gal, in-ground vinyl pool, single speed 3/4 HP Hayward pump, multi port valve on sand filter, using KS-2006 kit

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    Re: Pool closing - High CYA

    Is the polyquat 60 purchased online or at the pool store?
    Either way. I have never used it myself but I hear on this forum no advantage to purchasing one place or the other.

    Probably the most important information that has evolved for closing is the importance of closing late and opening earlier.....watch that pool temp.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Catanzaro's Avatar
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    Re: Pool closing - High CYA

    Amazon - Kem Tek PolyQuat 60 Non Foaming - Non Metallic Algaecide
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Frog Mineralizer System (EMPTY) - Hayward Super Pump 2 HP Model # k48m2n111
    Pool Company tests water (NO LONGER) TF-100 TEST KIT
    Date of Build is 11-2013

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