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Thread: pH dropped to 6.8, do I need immediate action?

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    pH dropped to 6.8, do I need immediate action?

    So, I had some issues with my plaster that I communicated to the PB. They sent someone over today to take a look at it. I came home this evening to do my daily readings, and it looks like my pH is reading 6.8 or possibly lower.

    I can't fathom why or how it dropped, and my best guess is that while the plaster guys were here, they possibly added something to my pool, or tried to acid wash my plaster? Everyone's closed right now so I'm not getting any answers tonight.

    The question is, do I need to urgently add anything to bring my pH back up? I don't (think I) have anything on hand at the moment.

    Sigh.
    12.5k IG, non-SWG, 13'x30', Geometric, black pebble tec, tanning ledge/water feature, 2 main drains, 2 skimmers, 4 returns, Tristar VS Pump, Hayward Cartridge Filter (C4030)
    TF-100 + Speed Stir
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    Prosper, TX

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    Mod Squad kimkats's Avatar
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    Re: pH dropped to 6.8, do I need immediate action?

    You can turn your water feature on and let it work on your PH. How neat is that??

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: pH dropped to 6.8, do I need immediate action?

    Haha, you guys are starting to rub off on me. That's the first thing I did. Pump is running on high speed to get that water up-up-up in the air.

    I'm guessing I don't need to go into battle-stations pH. Should I just let my water feature flow all night and check it in the morning, or will my pump melt and explode if I don't correct it? (;
    12.5k IG, non-SWG, 13'x30', Geometric, black pebble tec, tanning ledge/water feature, 2 main drains, 2 skimmers, 4 returns, Tristar VS Pump, Hayward Cartridge Filter (C4030)
    TF-100 + Speed Stir
    --------------
    Prosper, TX

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    Re: pH dropped to 6.8, do I need immediate action?

    What's the TA?
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  5. Back To Top    #5

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    Re: pH dropped to 6.8, do I need immediate action?

    TA was around 90, which was a little high I think. I sampled it tonight since I figured some sort of acid was added, and it's down to 70.
    12.5k IG, non-SWG, 13'x30', Geometric, black pebble tec, tanning ledge/water feature, 2 main drains, 2 skimmers, 4 returns, Tristar VS Pump, Hayward Cartridge Filter (C4030)
    TF-100 + Speed Stir
    --------------
    Prosper, TX

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    Re: pH dropped to 6.8, do I need immediate action?

    Ok, no worry. The pH should be back by morning. Brush the pool if you get a chance.
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  7. Back To Top    #7

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    Re: pH dropped to 6.8, do I need immediate action?

    Whew, thanks guys. I'll check it in the morning.
    12.5k IG, non-SWG, 13'x30', Geometric, black pebble tec, tanning ledge/water feature, 2 main drains, 2 skimmers, 4 returns, Tristar VS Pump, Hayward Cartridge Filter (C4030)
    TF-100 + Speed Stir
    --------------
    Prosper, TX

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    Mod Squad kimkats's Avatar
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    Re: pH dropped to 6.8, do I need immediate action?

    Glad we can be a good influence! The PH and TA are great friends and tend to work together. Once you get every thing table you will find the TA YOUR pool likes. You will know it is happy when the PH stays stable for quite a few days unless you are running your water feature or have a LOT of cannons balls going on!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: pH dropped to 6.8, do I need immediate action?

    Now might be a good time to ask that question. So, because I have a tanning ledge at 9" deep (I think it's about 10'x8', primary a splash pad for my kids), the PB opted to put that feature in there to increase flow on that "shelf." I keep it running for this reason. There's also two other returns on that shelf, but they direct water across it instead of upward. They're tied into the same valve that turns on my water feature.

    Should I be running the returns on my tanning ledge all the time to prevent accumulation of settling things on it? When my pump is on low speed, it's more of a "mound" of water instead of white water getting flung up into the air, but the water does break the surface a little bit. I keep it on, but I'm considering shutting it off. Now that I think about it, I had been fighting rising pH for a while, and I just attributed it to week 7 of curing plaster. I'm sure the aeration isn't helping to keep pH down.

    Edit: Oh, and I checked pH this morning. 7.2. I left the feature on because with these cooler temperatures I want to bring CSI back into range if I can by raising pH a bit more.
    Last edited by napkin41; 03-09-2018 at 09:16 AM. Reason: More info.
    12.5k IG, non-SWG, 13'x30', Geometric, black pebble tec, tanning ledge/water feature, 2 main drains, 2 skimmers, 4 returns, Tristar VS Pump, Hayward Cartridge Filter (C4030)
    TF-100 + Speed Stir
    --------------
    Prosper, TX

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    Re: pH dropped to 6.8, do I need immediate action?

    You'll get far more pH rise out of that curing plaster than you will having jets that riffle the water.

    Long term, I think personally I'd rather add a little more acid from time to time than to have yuck build up on that ledge, or to have the water stagnate in that area resulting in lower chlorination and localized algae breakouts. You need to brush anyways, but those jets will keep things on the ledge clean and clear.
    8,500gal plaster in-ground with attached spa, two floor drains, one skimmer. Chlorine, City Water.
    Pentair WhisperFlo 1hp Pump, MagnaTek Midcentury EPlus motor, Pentair CleanNClear 200SF Cartridge filter, Purex Triton MiniMax 250 Gas Heater, Pentair SunLite, AutoFill.
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    Re: pH dropped to 6.8, do I need immediate action?

    Excellent call, that does make sense!
    12.5k IG, non-SWG, 13'x30', Geometric, black pebble tec, tanning ledge/water feature, 2 main drains, 2 skimmers, 4 returns, Tristar VS Pump, Hayward Cartridge Filter (C4030)
    TF-100 + Speed Stir
    --------------
    Prosper, TX

  12. Back To Top    #12

    Re: pH dropped to 6.8, do I need immediate action?

    Did the plaster issue get resolved?

    What's the CSI now?
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  13. Back To Top    #13

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    Re: pH dropped to 6.8, do I need immediate action?

    Yeah, I guess there were a few spots where some of the dust had accumulated that hardened. The PB e-mailed me back today and told me they did indeed dump 1/4 gallon of acid on the dull spots to try and scrub them out a bit. Would have been nice to know, I'm usually at work when these things happen during the day.

    I was young, I was wreckless, I didn't know that you couldn't brush new plaster enough. Fortunately there's only a dull spot here or there.

    I've been running my pump on high all night and all morning (plus the plaster is still doing it's curing and raising of pH), but I won't be able to check the new measurements until I get home. If my pH was able to get up to 7.4 or 7.5 my CSI will be good!
    12.5k IG, non-SWG, 13'x30', Geometric, black pebble tec, tanning ledge/water feature, 2 main drains, 2 skimmers, 4 returns, Tristar VS Pump, Hayward Cartridge Filter (C4030)
    TF-100 + Speed Stir
    --------------
    Prosper, TX

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    Re: pH dropped to 6.8, do I need immediate action?

    Quote Originally Posted by napkin41 View Post
    I was young, I was wreckless, I didn't know that you couldn't brush new plaster enough.
    I'm writing a novel, can I use this as my opening line?
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    Re: pH dropped to 6.8, do I need immediate action?

    I'm writing a novel, can I use this as my opening line?
    As long as it says "co-authored by Napkin" you got yourself a deal.
    12.5k IG, non-SWG, 13'x30', Geometric, black pebble tec, tanning ledge/water feature, 2 main drains, 2 skimmers, 4 returns, Tristar VS Pump, Hayward Cartridge Filter (C4030)
    TF-100 + Speed Stir
    --------------
    Prosper, TX

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