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Thread: High ph

  1. Back To Top    #1

    Join Date
    Jun 2010
    Central Indiana

    High ph

    Our First spring with pool and the water is looking good as are all the numbers except ph. Ph always wants to float up and stay around 8. We can get it down to about 7.6 with muriatic acid then it's back up to 8 again in a few day. So far this spring I've used a large container of ph down and a gallon of muriatic acid. Don't want to keep putting money into getting the ph down if it's not necessary.

    So first question is should we just leave it where it wants to settle? Is this safe? If not, how do I get it down and keep if there?

    fc- 5
    Cya- between 40-50
    13500 gallon AG (24' round), 100 sf cartridge filter, Hayward 1hp pump, pool 10-15 years old with recently replaced liner

  2. Back To Top    #2
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Elverson Pa.

    High ph

    I would just keep lowering it with acid and it should just settle in. That will also lower TA and it should slow the PH raise some.
    If your CYA level is closer to 50 go with that number. The min FC for 50 is 4 and if it's closer to 40 min FC is 3.
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: High ph

    When you adjust pH, take it down to 7.2. That increases the time between additions. It will also lower the TA faster, which should help stabilize things.

    Also, if you have hard fill water, every time you add, you drive TA and pH up a little. Have you ever tested your fill water?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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