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Thread: when to open inground pool...

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    when to open inground pool...

    Sorry if this is a repetitive question but I haven't seen anything that addresses it...when is the best time to open my pool? I live in South Carolina. Is there a certain water temperature I should be waiting for? Thanks!
    13,500 gallons
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    Mod Squad Bama Rambler's Avatar
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    Re: when to open inground pool...

    You should open when the water temp gets to about 60º. If you let it get too warm stuff will start growing.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: when to open inground pool...

    Is there a suggested range, say opening between 40-60? I'm curious as well, how low of a water temp do people open at..?

    I assume at this point judging by the weather that if we do reach freezing overnight it won't be a big deal since the daytime highs are in the 50s-70s now. I know some people who don't close their pools make sure to have their pumps running 24/7 when it gets close enough to freezing. I run mine 24/7 anyway.

    Is there any reason not to open when your daytime high temp is averaging 60 and overnight low average is 40.

    The sunshine was incredible today, probably was around 55 at lunch, made me realize I might as well open the pool this weekend
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
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    linen's Avatar
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    Re: when to open inground pool...

    Quote Originally Posted by Speedo
    Is there any reason not to open when your daytime high temp is averaging 60 and overnight low average is 40.
    Yes, if you have a sun blocking cover, it is unlikely that you will need to do anything (i.e. sanitize) until it reaches 60F. Once you open it, then you will have to start sanitizing, etc.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: when to open inground pool...

    But other than maintenance costs, no reason..
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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    Isaac-1's Avatar
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    Re: when to open inground pool...

    Also when testing water at least some of the tests can be effected by cold water (CYA at least) so you may want to let your water warm up to room temperature before testing.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Re: when to open inground pool...

    I'll remember to do that. My water was 42 degrees on Wednesday, I'm expecting it to be between 44-48 when I open this weekend.
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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    linen's Avatar
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    Re: when to open inground pool...

    Just curious speedo, why the hurry to open? Can your heater actually get you warm enough to swim this early?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: when to open inground pool...

    In a word, impatience.

    I'm sick of looking at the black cover. But also last year we had a burst of heat for almost a straight week and I think having 1 good day of swimming would have been just enough to make the next month and a half of waiting seem not quite so long.

    I was targeting towards the end of the month to open anyway, couple weeks isn't that much different. I know that the weather predictions will change every day, but anytime I see upper 70s and sunny I feel that I need to have it open just in case it could work out for a glorious day of enjoyment.

    To answer your heater question; not only can it not get warm enough, but I don't want to waste the money either. However, under perfect circumstances I would definitely run it for a day or two.
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

  10. Back To Top    #10
    Mike S
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    Re: when to open inground pool...

    I opened mine this weekend here in NJ. Then past two years I opened up to a green pond in late April / early May. I figured I'd try getting a jump on it this year before the water warmed up and the algae had a chance to get a foothold. Knock on wood this opening has been a piece of cake. I probably went through 30 gallons of 12% bleach last year. This year after 5 gallons my free chlorine looks like it already holding steady.

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    Re: when to open inground pool...

    I am in northern NJ and just opened mine today. I always open it the first week in April. The water was 49 this morning, but is up to 51 now. It is perfectly clear and if I had a wet suit I would be swimming right now
    20x40 IG vinyl, heatpump and solar and 3 siberian huskies, 10kw PV solar electric system. Nikon Photographer D800e dSLR.

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    Join Date
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    Re: when to open inground pool...

    This will be my first time opening and I am getting anxious.... I did peak under the cover the other day and was thrilled to see that the water is clear. I need to re-stain my deck first though.
    Dedicated TFPer since 2012 with recommended test kit
    Above ground, 30 foot round pool, 21,000 gallons
    Hayward 150 sq foot cartridge filter, 1HP Waterway pump
    Raypak 400K BTU NG Heater!
    Installed in 2006? (just a guess, pool came with house I purchased in June 2012)

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