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Thread: Bring down alkalinity in my pool

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    Bring down alkalinity in my pool

    Just wanted you expert advice on what to do. First of all I'm on well water . I have a 24' above ground at 52" Aprox 14,500 gal. I just put in a swg. Right now I just turned it down from 18 hours to 15. Levels are
    Ph 7.8, alkalinity 170ppm. Ca 50ppm, hardness 0, fc around 5ppm. I'm trying to use muratic acid to bring down alkalinity and aeration to bring ph back up. Is there a faster way to bring alkalinity down. Thanks

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    Re: Bring down alkalinity in my pool

    Take a minute and add those pool details to your signature please Surface type too.

    Just lower pH as needed, your pH is going to rise with a SWG as it is, and you will be adding acid often enough.

    If you are determined to drop TA quicker than that, the Acid/aeration cycle is the fastest way I've heard of.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
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    Re: Bring down alkalinity in my pool

    Quote Originally Posted by Tsgtwheeler View Post
    Just wanted you expert advice on what to do. First of all I'm on well water . I have a 24' above ground at 52" Aprox 14,500 gal. I just put in a swg. Right now I just turned it down from 18 hours to 15. Levels are
    Ph 7.8, alkalinity 170ppm. Ca 50ppm, hardness 0, fc around 5ppm. I'm trying to use muratic acid to bring down alkalinity and aeration to bring ph back up. Is there a faster way to bring alkalinity down. Thanks
    Its a painfully slow process especially if you have to keep filling from evap.. Raises your Ta right back up...
    Are you having a hard time maintaining your PH? If its holding pretty well, you really don't need to mess with it... I have a TA of 150 but my ph is solid so I really don't mess around with it too much
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    Re: Bring down alkalinity in my pool

    Controlling your pH precisely will help a little.

    Bring it all the way down to 7.0 or 6.8 if you are going to aerate right away. pH should rise rather quickly. The rate of pH rise will slow after 7.6 or 7.8 so I would bring it back down with muriatic at 7.6.

    Be very precise. You can't measure ph below 6.8 so never let it drop below that.

    Aerate vigorously.....that'll help, too.
    Dave S.
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    Re: Bring down alkalinity in my pool

    ph seems to stay stable, my cwg system is awsome just turned it down to 12 hours from 15 because my pool is still above 5ppm chlorine

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    Re: Bring down alkalinity in my pool

    More here on what to put in your signature and how to do it, Pool School - Read This BEFORE You Post
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    Re: Bring down alkalinity in my pool

    Quote Originally Posted by Tsgtwheeler View Post
    ph seems to stay stable, my cwg system is awsome just turned it down to 12 hours from 15 because my pool is still above 5ppm chlorine
    Following our system, the chlorine level is always maintained as a ratio to CYA. You have not listed your CYA, so 5ppm could be high or low.

    See FC/CYA Chart

    What is your CYA level? What test kit are you using?
    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: Bring down alkalinity in my pool

    FC - 3ppm
    pH- 7.0
    TA - 100ppm finally
    CH - 3400ppm
    CYA - 40
    ph a little low just hooked up my fountain.
    not sure why my signature does not come up it is saved

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    Re: Bring down alkalinity in my pool

    FC 4PPM
    PF-7.2
    TA 100 PPM
    CH 350 PPM
    CYA 40
    AG 24' 14,500 gal.solaxx saltron retro saltwater chlorine generator,200lb sand filter,3/4hp, 3450 rpm haward super pump model C48J2N131B1, single speed
    smart pool timer for pump,well water,new liner installed 7-15/16 taylor dpd test kit

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    Mod Squad pooldv's Avatar
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    Re: Bring down alkalinity in my pool

    I don't see a sig saved in your profile. More here, Pool School - Read This BEFORE You Post
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    Re: Bring down alkalinity in my pool

    I have done this and saved my signature. I see I'm on my own.

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    Mod Squad pooldv's Avatar
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    Re: Bring down alkalinity in my pool

    I don't know what on your own means, we are here trying to help you. You have not created and saved a signature in your profile on Pool School - TFP Home Page. Maybe you did in Tapatalk but we are not tapatalk. Open TFP in a browser, scroll to the bottom select Full Site and follow the instructions here, Pool School - Read This BEFORE You Post
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Bring down alkalinity in my pool

    FC 8PPM
    PF-7.8
    TA 100 PPM
    CH 350 PPM
    CYA 40
    this is what i have right now. i put in a bottle of chlorine because we just had a big rain. guess thats why my ph is up to will use acid after chlorine levels back out if ph is still up. my chlorinator keeps my pool around 4ppm is tht to much i have it running 11 hours a day right now
    AG 24' 14,500 gal.solaxx saltron retro saltwater chlorine generator,200lb sand filter,3/4hp, 3450 rpm haward super pump model C48J2N131B1, single speed
    smart pool timer for pump,well water,new liner installed 7-15/16 taylor dpd test kit

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    Mod Squad pooldv's Avatar
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    Re: Bring down alkalinity in my pool

    Yes, the aeration from the rain can cause pH to rise.

    We recommend having CYA at 70 to 80 ppm for a saltwater pool so there is less work for the SWG. Especially in the TX sun.

    No, FC of 4 ppm is not too much, it is a little low. 5-6 ppm FC would be better with 40 CYA. Chlorine is set based on CYA level and the FC/CYA Chart. FC needs to always be above minimum to keep your pool safe, sanitary and algae free.

    More here on saltwater, Pool School - Water Balance for SWGs
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    Re: Bring down alkalinity in my pool

    Ok I'll bring up the cya

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    Re: Bring down alkalinity in my pool

    Your signature says you use a "taylor dpd test kit". Is that the K-2005?
    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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