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Thread: Getting ready for Spring... chemistry is all over the place. Please help

  1. Back To Top    #1

    Join Date
    Jul 2017
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    THE WOODLANDS
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    Getting ready for Spring... chemistry is all over the place. Please help

    I have a 15000 gal in-ground plaster pool. currently is covered with a leaf cover so it doesn't get a whole lot of sunshine. Plus, near Houston we are not going to get much sun in the next few days.

    I just tested the water and here is what I got.

    PH 8.2+
    FC 5
    CC .25
    TC 5.25
    CH 225
    TA 100
    CYA <20

    I am going to put some Muriatic acid tonight to bring the PH down a bit before I start SLAMing, should I raise the CYA before starting to SLAM? As I said, the pool is currently covered with a leaf cover (on top of a Catch-a-kid safety net), t offers a great deal of shade.

    any help will be appreciated.

    Thanks,


    DrThop

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    Divin Dave's Avatar
    Join Date
    Oct 2013
    Location
    Longview, Texas
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    5,162

    Re: Getting ready for Spring... chemistry is all over the place. Please help

    Hi DrThop

    Bring your CYA up to about 30 and your pH down to about 7.2 if you are going to SLAM.


    I have a question though.

    Why are you slamming? Your CC is fine. Do you have algae growing? You didnt mention that. The only reason to SLAM is if you fail the 3 criteria for it.
    1 Visible algae
    2 CC above .5
    3. OCLT more than .5

    If you dont have any visible algae, then just do an overnight chlorine loss test and if the loss is less than .5, then no need to slam.

    You might need to run the filter for a couple days if the water is really dirty and maybe vacuum, but shouldn't be all that hard for you to get up and running.

    Your CH could stand a slight bump but I dont see it as a problem where it is. TA is fine.
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

  3. Back To Top    #3

    Join Date
    Jul 2017
    Location
    THE WOODLANDS
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    Re: Getting ready for Spring... chemistry is all over the place. Please help

    Hi Dave,

    The water is very cloudy, and I do have some algae, but you are right, I'll check in the morning and see if the chlorine loss is greater than 0.5. I just added the Muriatic Acid to adjust the pH.

    thanks for the advice.

    best.

    DrThop

  4. Back To Top    #4

    Re: Getting ready for Spring... chemistry is all over the place. Please help

    Cloudy with algae means that a full SLAM is indicated. The OCLT will almost definitely fail due to the algae.
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