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Thread: ph going crazy

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    ph going crazy

    Need some guidance?

    Ph is rising .2 daily. Am doing the BBB thing. Filter runs 9 hours daily. Very low pool useage at this time of year.

    FC 5
    CC 0
    PH 8.0
    TA 100
    CYA 50
    CH 55
    Have been adding a 182 oz jug of 6% clorox nightly. What is making the Ph climb? Have been adding MA to lower Ph.
    27K IG Vinyl Pool
    1 HP Hayward pump
    Hayward sand filter/ 3720 GPH
    Taylor K-2005 & K1515A test kits

  2. Back To Top    #2
    linen's Avatar
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    Re: ph going crazy

    Do you have any water aeration occurring...fountains, waterfalls, lots of splashing, a return pointed towards surface, etc?

    Aeration will raise ph.

    Also, your TA is at the upper end of the recommend range for bleach users (70-90+ ppm). By adding MA as you are, you also will be slowly lowering your TA and eventually it should get down into the recommended range. Then if the ph climb is being caused by the slightly high TA now, it should reduce.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  3. Back To Top    #3

    Re: ph going crazy

    One return near the steps is slightly breaking the surface. I will turn it downwards and see if that makes a diff.
    27K IG Vinyl Pool
    1 HP Hayward pump
    Hayward sand filter/ 3720 GPH
    Taylor K-2005 & K1515A test kits

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    Mod Squad JohnT's Avatar
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    Re: ph going crazy

    Quote Originally Posted by arleetrip
    Need some guidance?

    Ph is rising .2 daily. Am doing the BBB thing. Filter runs 9 hours daily. Very low pool useage at this time of year.

    FC 5
    CC 0
    PH 8.0
    TA 100
    CYA 50
    CH 55
    Have been adding a 182 oz jug of 6% clorox nightly. What is making the Ph climb? Have been adding MA to lower Ph.
    Keep your pH in the lower end of the range. 7-7.2. This will eventually lower your TA and reduce the inclination for the pH to rise.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  5. Back To Top    #5

    Re: ph going crazy

    Lowered TA to 7.0
    ph is still climbing at a rate of .2 day day. What is causing this. I'm having to add 25 oz. of MA per day. Last year I only had to add MA twice in the whole season.
    27K IG Vinyl Pool
    1 HP Hayward pump
    Hayward sand filter/ 3720 GPH
    Taylor K-2005 & K1515A test kits

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    In the Industry

    duraleigh's Avatar
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    Re: ph going crazy

    Based on the information provided, the pH rise is inexplicable as far as I can see. I am posting to emphasize that regardless of the cause, it is important that you keep your pH in the 7'S, no matter how much acid it takes.

    Wish I had an idea for the pH rise.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    JasonLion's Avatar
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    Re: ph going crazy

    When TA gets down to around 60, change to only lowering PH to about 7.6.
    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

  8. Back To Top    #8

    Re: ph going crazy

    1. The acid/aeration process to lower TA:
    2. Add acid to lower your PH to between 7.0 and 7.2 (this also lowers TA)
    3. Aerate until PH rises to around 7.6 (the only way to raise PH without also raising TA)

    Repeat steps 1 and 2 until you reach the desired TA.

    How long should I wait after adding MA to begin aeration?
    27K IG Vinyl Pool
    1 HP Hayward pump
    Hayward sand filter/ 3720 GPH
    Taylor K-2005 & K1515A test kits

  9. Back To Top    #9
    linen's Avatar
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    Re: ph going crazy

    Right away is fine since the ph will balance in your pool ~1/2 hour and the aeration to raise is a slow process.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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