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Thread: Pool Closing tips

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    Join Date
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    Pool Closing tips

    Hi All. Great info found on this site!

    I realize this is the time of year people are opening their pools, but I have questions regarding closing the pool. I have own a pool for the past 8 years and every year I have a green swamp when I open. Can anyone tell me what I would need to add at closing to prevent this SLAM every year? I have a 18X36 kidney shaped concrete, vinyl lined pool. 4' in shallow end and 8' deep end. Sand filter.

    Any suggestions would be welcome. Thanks.

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    Re: Pool Closing tips

    I always close my pool when the water is about 50 degrees, my cover is usually on a month before that. When the water reaches that temp. I bring it up to my shock level,lower the water level and blow the lines and remove the pump.
    In the spring I also try to open at 50 degrees and when I test the water it still has chlorine and is clear.
    19,000 gal - Vinyl IG - Sand filter -1.5hp. - Taylor k 2006 - Loop Loc cover

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    Mod Squad tim5055's Avatar
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    Re: Pool Closing tips

    Welcome to TFP!!

    Yup, close late and open early. Cold water slows the ability of algae to reproduce (does not stop it). So, close when it is cold and open when it is cold and you have a better chance of avoiding a green opening.
    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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    Re: Pool Closing tips

    Best advise as already mentioned is to close late and open early.

    A pool that size should turn so quickly without sunlight. I am going to guess that you have a safety cover (mesh) as opposed to the vinyl?
    These allow more sunlight penetration and sometimes water / dirt into your pool depending on what else is around you.

    It could be advantageous to add some bleach and brush / agitate during the first thaw or prior to the first freeze depending on when you are closing and temperatures.
    18' x 36' vinyl steel wall pool with deep end, 2 lights and 6' steps, main drain, SWG, Cartridge Filter, 320,000 BTU Rheem heater, 3/4HP 1 stage pump - Ontario, Canada

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    Re: Pool Closing tips

    Quote Originally Posted by carpenter333 View Post
    Best advise as already mentioned is to close late and open early.

    A pool that size should turn so quickly without sunlight. I am going to guess that you have a safety cover (mesh) as opposed to the vinyl?
    These allow more sunlight penetration and sometimes water / dirt into your pool depending on what else is around you.

    It could be advantageous to add some bleach and brush / agitate during the first thaw or prior to the first freeze depending on when you are closing and temperatures.
    Yes, I have the mesh safety cover. I know I am not doing something right when closing because I see my neighbors pools aren't green when opening. A lot of them have pool companies open so they have no idea what goes in it or can offer any credible advice.

    So, before I drain it down I should bring it to shock level for a day? Then drain to below the returns.

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    Re: Pool Closing tips

    Quote Originally Posted by cashdude View Post
    Yes, I have the mesh safety cover. I know I am not doing something right when closing because I see my neighbors pools aren't green when opening. A lot of them have pool companies open so they have no idea what goes in it or can offer any credible advice.

    So, before I drain it down I should bring it to shock level for a day? Then drain to below the returns.
    Yep, that's what you need to do. And you don't need any of those floating chlorine tab holders either.
    19,000 gal - Vinyl IG - Sand filter -1.5hp. - Taylor k 2006 - Loop Loc cover

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    Re: Pool Closing tips

    Quote Originally Posted by samt View Post
    Yep, that's what you need to do. And you don't need any of those floating chlorine tab holders either.
    Awesome. I normally just buy the pool closing kits you can get at the pool store so I will try this.

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    Re: Pool Closing tips

    That has been my method for years. I now have a vinyl winter cover which I have found to be more consistent for a clear blue open.

    If you close early, you are likely having your Chlorine levels diluted from the additional rain water, snow load and melt. Those covers also allow sun-light penetration.

    This is why I recommend opening the safety cover before the first freeze and test. Likewise after the first thaw. Don't forget to stir and agitate after adding bleach / chlorine if it needs the top up because your pump wont be running at this point.


    ***don't buy the pool store closing kits***
    18' x 36' vinyl steel wall pool with deep end, 2 lights and 6' steps, main drain, SWG, Cartridge Filter, 320,000 BTU Rheem heater, 3/4HP 1 stage pump - Ontario, Canada

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    Join Date
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    Re: Pool Closing tips

    Quote Originally Posted by carpenter333 View Post
    That has been my method for years. I now have a vinyl winter cover which I have found to be more consistent for a clear blue open.

    If you close early, you are likely having your Chlorine levels diluted from the additional rain water, snow load and melt. Those covers also allow sun-light penetration.

    This is why I recommend opening the safety cover before the first freeze and test. Likewise after the first thaw. Don't forget to stir and agitate after adding bleach / chlorine if it needs the top up because your pump wont be running at this point.


    ***don't buy the pool store closing kits***
    Thank you! How would I stir/agitate if I can't run the pump? Just use the long pole with the brush on it?

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