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Thread: First partial closing - have questions

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    First partial closing - have questions

    This will be our first year closing a pool. I want to put the cover on tomorrow and let the SWG run a few hours a day until the water gets cold enough to completely close. The main reason I want to close now is because of all the leaves and junk that will continually get blown into the pool without me being able to get in and clean it. The water temp was 76 today and I'm not sure if I can go much lower. I think 74 would be my limit.

    My questions are:

    1. Should I add the poly60 tomorrow before I put the cover on?

    2. PH is 7.7 today. Should I lower it?

    3. Does it matter if I have the air pillow in place with the pump running?

    4. CYA is lower than recommended, is this ok until Spring? We had so much rain this summer that I constantly had to drain the pool. Only once all summer did I need to add any water.

    5. Is it ok to collect water for testing from the skimmer? We will have to put the cover on tight because we get a lot of wind.

    6. When the temp gets to 60, can I use the super chlorinate option on the SWG to get it at shock level? Thanks to pool school I have never used this option.

    Sorry for so many questions. They may sound dumb, but I want to make sure I do everything right.

    Salt Level 3200
    FC 5
    CC 0
    PH 7.7
    CH 150
    TA 90
    CYA 60

    Thanks for your help,
    Tammy
    13K gal, 24' AG
    Waterway Clearwater II 150 sq Cartridge Filter with Hi-Flo 1-1/2HP Dual Speed Pump
    Hayward Aqua-Trol SWG
    Date installed: May 2013

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    BoDarville's Avatar
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    Re: First partial closing - have questions

    I'll take most of your questions...

    Quote Originally Posted by TammyLynne
    1. Should I add the poly60 tomorrow before I put the cover on?
    No, since you will be running the SWG a few hours each day. The SWG will produce enough chlorine to keep the pool sanitized.
    Quote Originally Posted by TammyLynne
    2. PH is 7.7 today. Should I lower it?
    I would lower pH to around 7.4 to provide a little breathing room for the typical rise in pH from SWG.
    Quote Originally Posted by TammyLynne
    4. CYA is lower than recommended, is this ok until Spring? We had so much rain this summer that I constantly had to drain the pool. Only once all summer did I need to add any water.
    I would leave CYA alone, especially since pool will be covered.
    Quote Originally Posted by TammyLynne
    5. Is it ok to collect water for testing from the skimmer? We will have to put the cover on tight because we get a lot of wind.
    Yes, though I would collect the water while the pump has been running for at least 30 min to ensure it is well circulated.
    Quote Originally Posted by TammyLynne
    6. When the temp gets to 60, can I use the super chlorinate option on the SWG to get it at shock level? Thanks to pool school I have never used this option.
    No, you will need to use bleach to superchlorinate to SLAM levels. As the water temperature drops, the SWG produces less chlorine. Even at normal summer swim temperatures, the SWG is not designed to produce chlorine at shock (SLAM) levels. Once the water temp drops below 70F, I would test FC daily to make sure the SWG is providing enough chlorine. At the point you find that it is not, I would turn off the SWG and use liquid bleach for chlorination. I would definitely turn off the SWG once you officially close the pool.

    When the water temp drops below 60F, then I would superchlorinate (SLAM) using liquid bleach. When adding liquid bleach, I would recommend adding it in front of a return jet as opposed to adding it through the skimmer. You may have to remove part of the cover to do this. Once the chlorine level drops about half way between the SLAM level and normal maintenance level for your CYA, then you may optionally add Polyquat 60 algaecide for a little extra insurance against algae.

    This will help you determine the shock (SLAM) level for your pool based on the CYA level: Chlorine CYA Chart.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
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    Re: First partial closing - have questions

    Thank you so much for the reply and for all your information! I really appreciate this website and your willingness to help.

    I guess I will put the air pillow in place and see what happens.
    13K gal, 24' AG
    Waterway Clearwater II 150 sq Cartridge Filter with Hi-Flo 1-1/2HP Dual Speed Pump
    Hayward Aqua-Trol SWG
    Date installed: May 2013

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