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Thread: Climbing pH ??

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    Climbing pH ??

    I've been using the SWG for 5 weeks and I have to add 1 gal of 31% Muriatic Acid per week to keep my pH below 8.2. It will go to 7.4 after the dose but climbs to 8.2 in a week.
    FC 9
    CYA 70
    TA 90
    Salt 3400
    Calcium 230
    pH 7.4---->8.2
    I have a good size Fountain recently installed....

    Does this seem normal?
    35,000 Gal. - 40x20x8 - Plaster - SWG Pentair IC 60 - Barracuda G3 Vacuum - Hayward c1750 Cartridge Filter - Blue Torrent VS 1.5hp pump - Pool is 45 years old.

    "I'd build a deck over my pool if I didn't have a SWG"

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    Mod Squad jblizzle's Avatar
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    Re: Climbing pH ??

    SWG aerates and raises the pH
    Fountains aerate and raise the pH

    As you keep adding acid, the TA should lower and the pH rise should slow down. Maybe when you get the TA to 50-60ppm, the pH rise will nearly stop or get stable around 7.8
    Jason, TFP Moderator
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    Mr Bruce's Avatar
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    Re: Climbing pH ??

    Yes. SWG + fountain = pH up up up!

    Just keep telling yourself it's 1 gallon of acid instead of 3-4 gallons of bleach!
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
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    Re: Climbing pH ??

    Wait it takes a gallon to lower mine from 8.0 to 7.3. My pool is significantly larger than yours. Are you sure that's right for you to use a gallon? I thought I was the only one on here with a gallon per week consumption rate.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: Climbing pH ??

    Would the addition of Borates fix this pH issue?
    35,000 Gal. - 40x20x8 - Plaster - SWG Pentair IC 60 - Barracuda G3 Vacuum - Hayward c1750 Cartridge Filter - Blue Torrent VS 1.5hp pump - Pool is 45 years old.

    "I'd build a deck over my pool if I didn't have a SWG"

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    Mod Squad jblizzle's Avatar
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    Re: Climbing pH ??

    You need to get the TA down before considering borates. And with the borates, you use the same amount of acid to lower the pH, you just do not have to do it as often, but when you do, it takes a lot more acid.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Climbing pH ??

    Thanks Jason
    I'm a little unclear on lowering my TA.
    The way I read it is to hammer the pH down to 7.2 and let it climb up over and over again until the TA comes down?
    If that's right, how many "hammer down" cycles do I go through. I'm at at least 5 now?
    35,000 Gal. - 40x20x8 - Plaster - SWG Pentair IC 60 - Barracuda G3 Vacuum - Hayward c1750 Cartridge Filter - Blue Torrent VS 1.5hp pump - Pool is 45 years old.

    "I'd build a deck over my pool if I didn't have a SWG"

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    Mod Squad jblizzle's Avatar
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    Re: Climbing pH ??

    That is the process ... it takes as many as it takes

    What is the TA in your refill water? Or are you not having to add water to the pool?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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