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Thread: PH and Water Temp

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    jamesd8's Avatar
    Join Date
    Apr 2014
    San Diego

    PH and Water Temp

    I just started using a pool cover and it has caused water temp to rise. I have read on here that this may cause PH to change. Water is definitely warmer, maybe 5-7 degrees. My question is, do I need to add muriatic acid if PH reading goes up every time it does if it is related to a water temp change? My PH went up from 7.6 to 8. And if so, I bought some but pool calculator asks for a baume % and I don't see that in the ingredients of the liquid muriatic acid I purchased.

    Intex 15'x4' round AG metal frame pool, 4400 Gallon, Krystal 14" 2150GPH Sand pump/filter .75HP. Taylor 2006 test kit. San Diego, CA.

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    Patrick_B's Avatar
    Join Date
    Jun 2011
    Midland TX

    Re: PH and Water Temp

    Don't worry about temperature having an effect on pH. Watch the pH and keep it between 7.2-7.8. If you have hard water, keep it on the lower end.

    The calculator lists percentage first, and Baume degree afterward in the same box. Buy acid that is 20 degree/31.4% for use in you pool.

    If this is a new pool, or you have high TA you can expect a quicker pH rise for a while.
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