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Thread: pH raises constantly

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    pH raises constantly

    Hi,
    Since I've been testing daily with the Taylor K-2006 I've notice my pH constantly raising.
    Today it sits at 7.7.
    No more than 3 days ago it was at 7.8 and I added 12oz of muriatic acid to bring it around 7.4.
    Is this normal?
    Thnx




    13K gal, IG plaster, 1 1/2 HP Pentair WhisperFlo, Hayward C900 cartridge filter, Taylor K-2006 FAS-DPD, Hayward AquaNaut® 200, built around 1979

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    Richard320's Avatar
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    Re: pH raises constantly

    Can be.

    If your refill water is high in TA it will be a neverending battle. If you have a spa or a slide or a waterfall, the aeration also drives pH up.

    Try targeting 7.2 pH. It'll buy you an extra day or two and will speed up the natural lowering of TA. Since I got my TA down to 60, my pH stays a lot steadier.
    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.
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    pH raises constantly

    I tested my tap water pH a couple of days ago and it took 4 drops of acid demand to get it in the 7.4 range. I did not test TA though.

    For today's occurrence no refill was done as it rained enough to compensate evaporation loss. Can rain rise pH? Can it aerate the water?

    I have no spa, water feature or anything that would aerate the water

    Thnx
    13K gal, IG plaster, 1 1/2 HP Pentair WhisperFlo, Hayward C900 cartridge filter, Taylor K-2006 FAS-DPD, Hayward AquaNaut® 200, built around 1979

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    Mod Squad jblizzle's Avatar
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    Re: pH raises constantly

    Alternatively, I am concerned your water might be corrosive to your plaster since your CH is so low. As such, you might want to see if your pH stabilizes around 7.8 which would be safer.

    Oh and yes reason can raise the pH as it does aerate.
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    Re: pH raises constantly

    Quote Originally Posted by jblizzle View Post
    Alternatively, I am concerned your water might be corrosive to your plaster since your CH is so low. As such, you might want to see if your pH stabilizes around 7.8 which would be safer.

    Oh and yes reason can raise the pH as it does aerate.
    I did a 65% drain/refill 4 weeks ago to lower my CYA. After the first test I noticed CH being low but wanted to SLAM and clear the water before taking care of it. I was planning on doing CH this weekend.

    I do get a little chorine smell which from reading other post shouldn't be the case if pH and TA are within range.

    Should I take care of CH now or wait to see if pH stabilizes at 7.8?

    Thnx


    13K gal, IG plaster, 1 1/2 HP Pentair WhisperFlo, Hayward C900 cartridge filter, Taylor K-2006 FAS-DPD, Hayward AquaNaut® 200, built around 1979

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    Mod Squad jblizzle's Avatar
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    Re: pH raises constantly

    In FL I would bump up the CH since the rain is going to continually lower it. Also see if the pH stabilizes around 7.8, no worry there.

    The pH and TA have nothing to do with a chlorine smell. High CC is usually the reason for any smell.
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    Re: pH raises constantly

    Best place to buy calcium chloride? Hardware store? Pool store?


    13K gal, IG plaster, 1 1/2 HP Pentair WhisperFlo, Hayward C900 cartridge filter, Taylor K-2006 FAS-DPD, Hayward AquaNaut® 200, built around 1979

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    Mod Squad pooldv's Avatar
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    Re: pH raises constantly

    More about calcium chloride alternatives and what they're called here, Pool School - Recommended Pool Chemicals
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    Re: pH raises constantly

    Quote Originally Posted by southflorida427 View Post
    Best place to buy calcium chloride? Hardware store? Pool store?
    Since snowmelt is probably unknown in Florida except in the memories of transplanted retirees... start in the pool section at Walmart or a chain hardware store. Pool store should have it, but probably at hugely inflated prices.
    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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    Re: pH raises constantly

    No calcium chlorida in hardware stores or walmart around here.

    Pool store bag says "100% calcium chloride compound"... the "compound" part made me doubt. Is this OK?


    13K gal, IG plaster, 1 1/2 HP Pentair WhisperFlo, Hayward C900 cartridge filter, Taylor K-2006 FAS-DPD, Hayward AquaNaut® 200, built around 1979

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    Mod Squad pooldv's Avatar
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    Re: pH raises constantly

    Yes, it's fine. Otherwise you'll have to order some de-icers from somewhere north.
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    Re: pH raises constantly

    Liquid Chlorine will raise your PH dramatically. PH of LC is 13 I believe.
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    Mod Squad jblizzle's Avatar
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    Re: pH raises constantly

    Quote Originally Posted by Sentinal69 View Post
    Liquid Chlorine will raise your PH dramatically. PH of LC is 13 I believe.
    Not exactly. When the FC is consumed, the bleach effectively becomes pH neutral.
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    Re: pH raises constantly

    Quote Originally Posted by jblizzle View Post
    Not exactly. When the FC is consumed, the bleach effectively becomes pH neutral.
    So if I dump a gallon of LC in my pool, my PH will not rise ?
    Indoor - 10k gal - Inground - Sand filter / Hayward Heater / Hayward Pump

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    Mod Squad jblizzle's Avatar
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    Re: pH raises constantly

    1 gallon would not be noticeable

    One reason we recommend lowering the pH prior to starting the slam process is that when you add a lot of bleach it can have a small impact on the ph and make it go up. But as that FC is consumed the pH will come back down.
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    Re: pH raises constantly

    Following up on this post.
    Today I tested pH again and it's between 7.8 and 8.
    Last time I added muriatic acid was 9 days ago. There has been some heavy rain the past two days.
    I will correct pH Saturday.


    13K gal, IG plaster, 1 1/2 HP Pentair WhisperFlo, Hayward C900 cartridge filter, Taylor K-2006 FAS-DPD, Hayward AquaNaut® 200, built around 1979

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    Re: pH raises constantly

    pH keeps raising constantly. Finding myself adjusting every weekend (usually from around 8 down to 7.2)
    Anything I should do? Or just get used to it?
    Thank you all for your help.


    13K gal, IG plaster, 1 1/2 HP Pentair WhisperFlo, Hayward C900 cartridge filter, Taylor K-2006 FAS-DPD, Hayward AquaNaut® 200, built around 1979

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    Mod Squad pooldv's Avatar
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    Re: pH raises constantly

    As your TA lowers from the acid additions your pH rise will slow down. If you are running any waterfalls, bubblers, etc those will also raise ph.
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    Re: pH raises constantly

    Quote Originally Posted by pooldv View Post
    As your TA lowers from the acid additions your pH rise will slow down. If you are running any waterfalls, bubblers, etc those will also raise ph.
    Hi, thnx for your reply.
    No water features.
    TA is around 70. Will check again tomorrow. Should I let it go under 70?


    13K gal, IG plaster, 1 1/2 HP Pentair WhisperFlo, Hayward C900 cartridge filter, Taylor K-2006 FAS-DPD, Hayward AquaNaut® 200, built around 1979

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    Mod Squad pooldv's Avatar
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    Re: pH raises constantly

    Yes, TA as low as 50 is generally ok as long as the pH isn't erratic.
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