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Thread: PH creeping up..is this normal?

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    Join Date
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    Question PH creeping up..is this normal?

    I started TFP method about a week ago. Things are getting better after my original SLAM and I have been adding bleach daily however every few days my Ph seems to creep up to 8ish and I add acid to get it back down. Is this normal with the bleach method or do I have something else going on?

    PH: 8
    FC: 7.5
    CC: 0ish
    TA: 125
    CYA: 65

    Thanks
    13,500 gal in ground pool with pebble tec liner, intelliflow variable speed pump, cartridge filters, UV filter and solar heater.

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    JoyfulNoise's Avatar
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    Re: PH creeping up..is this normal?

    Your TA is what is driving up your pH. If one uses trichlor pucks, then pH creep is less likely because trichlor is very acidic. Now that you are using bleach, there is no continuos source of acid to keep the natural pH rise from happening.

    Lowering your TA target will help. Many people find 80ppm to be a good place to start. You will still need to use acid, but the frequency of additions will go down.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: PH creeping up..is this normal?

    Ok, so I need to try and get my TA down by adding muratic acid but I don't want my ph to go below 7.2...so this could take a few additions correct?

    Thanks
    13,500 gal in ground pool with pebble tec liner, intelliflow variable speed pump, cartridge filters, UV filter and solar heater.

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    Mr Bruce's Avatar
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    Re: PH creeping up..is this normal?

    You've got it!
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

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    JoyfulNoise's Avatar
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    Re: PH creeping up..is this normal?

    Quote Originally Posted by texag99 View Post
    Ok, so I need to try and get my TA down by adding muratic acid but I don't want my ph to go below 7.2...so this could take a few additions correct?

    Thanks
    Yup. Follow the article in Pool School for lower TA. You will lower your pH to 7.0-7.2 range which will consume alkalinity and then aerate your water (brush hard, swim, cannonballs, water features, etc) until the pH rises up to 7.6. Repeat cycle.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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