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Thread: PH and return

  1. Back To Top    #1

    Join Date
    Jul 2010
    Location
    southern indiana
    Posts
    10

    PH and return

    Hi
    I have had the pool open for about a month... clear water everyday, I add bleach daily, I check
    the water with a k2006. I lose probably 2-3 ppm per day... Over night test has been less than one.
    My TA is about 130 ... Cya about 50... FC was 4 this evening before adding bleach...

    What fluctuates is the PH...

    If I point the return eye up the Ph goes to 7.8 (Heavy bubbles on surface)

    If I point it down the PH drops to 7.0 (No surface bubbles)

    I run the pump in (2) 6 hour sessions...

    Is this normal ?
    Mike

    22,000 gallons, cartridge filter, 1.5 hp hayward pump
    ag, vinyl

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,089

    Re: PH and return

    Partly. The aeration is removing CO2 from the water and raising the pH. It's not really normal for it to go back down by pointing the return down though with your TA abov 100ppm. How do you chlorinate?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Join Date
    Jul 2010
    Location
    southern indiana
    Posts
    10

    Re: PH and return

    I add bleach... 6% lately

    I have added stabilizer to get to 50.

    I have added MA to lower TA..

    and I add bleach daily...

    That's it...
    Mike

    22,000 gallons, cartridge filter, 1.5 hp hayward pump
    ag, vinyl

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: PH and return

    Muriatic acid lowers both the PH and the TA. If you are adding MA regularly the PH will tend to go down unless you have something (like the aeration from pointing the returns up) to bring the PH back up.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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