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Thread: Help me with PH Bounce

  1. Back To Top    #1

    Join Date
    Jul 2007
    Location
    Owasso, Ok ( Just North of Tulsa )
    Posts
    17

    Help me with PH Bounce

    My PH goes from 7.4 to 8.0 Every night, If add PH decreaser in the morning to get it back to 7.3 /7.4 range it stays all day without going up but maybe to 7.5. But in the morning it will be right back at 8.0. I have a digital PH meter calibrated perfectly to 4.0 and 7.8 and double check with the test kit.

    Here are my numbers after a heavy bather load yesterday ( 20 + ) I added the same amount of PH decreaser last nite that I always have to add so it was at 7.6 this morning.

    FC 8
    CC 1
    TC 9
    PH 7.6
    T/A 110
    CH 230
    CYA 30

    ORP 710

    Salt 3200 PPM

    Ozone Generator on all the time.

    Chlorine Generator set to 30%

    Water Temp 90
    Air Temp 70

    25,000 Gal Plaster Pool.

    I only operate the Waterfall if we are in the pool so its off 90% of the time.

    Water in Pool for about 1 Month.

    The PH has been Bouncing up and down like this since we filled the pool, Never has been below 7.2 but is usually 8.0.


    What should I try to keep the PH a little more stable?

    Thanks
    Ed
    34'X 15' 3'-8' depth 22,000 gallon in-ground Grecian style built July of 2004, Blue Tahoe PebbleSheen, Poolpilot DIG-220 w/SC-60 SWCG, Pentair WFE-4 1HP filter pump, 6' S/S Waterfall and WFEDS-6 2 spd Waterfall pump, Letro Legend Platinum cleaner w/LA01N pump, Sta-Rite DE filter S8D110 53 sq. ft., 648 sq ft. East facing Solar panels w/Pentair LX 220 solar control, 6' Pewter Gray SR Smith Glas-Hide dive board on black powder coated cantilever stand w/SS hardware

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887
    If you lower your TA to the 70-80 range that should help noticably. Low PH plus high TA plus a SWG will make the PH go up.

    I would suggest raising your CYA up to around 60 to 80. That will allow you to turn down the percentage on your SWG, which will increase the cell life and also help slow the PH rise.

    Unless you reguarly have that many people swimming you can also lower the FC level, which will also help slow the PH rise since the cell will be on less often.
    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

  3. Back To Top    #3

    Join Date
    Jul 2007
    Location
    Owasso, Ok ( Just North of Tulsa )
    Posts
    17
    I will give it a try

    Thanks
    Ed
    34'X 15' 3'-8' depth 22,000 gallon in-ground Grecian style built July of 2004, Blue Tahoe PebbleSheen, Poolpilot DIG-220 w/SC-60 SWCG, Pentair WFE-4 1HP filter pump, 6' S/S Waterfall and WFEDS-6 2 spd Waterfall pump, Letro Legend Platinum cleaner w/LA01N pump, Sta-Rite DE filter S8D110 53 sq. ft., 648 sq ft. East facing Solar panels w/Pentair LX 220 solar control, 6' Pewter Gray SR Smith Glas-Hide dive board on black powder coated cantilever stand w/SS hardware

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