Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Chronic High PH

  1. Back To Top    #1

    Join Date
    May 2016
    Location
    MN
    Posts
    2

    Chronic High PH

    Folks,

    This is my second pool (so total of 15 years of pool ownership) so not a total Newbie. This latest one is a salt (mineral) system.

    I tend and care for pool myself, dont hire a service. Its a low traffic environment. Just my wife and I and a teenage son who's gone a lot, so the pool doesn't get used a ton

    My chlorine level is perfect, my salt level is perfect. I take my water in for testing at my local pool store monthly. Nothing else to worry about. No metals etc.

    But for some reason my PH levels are chronically high. I add MA and bring them down to ideal levels, but in less than a week they go right back up again.

    I have read that salt pools tend to do this, but really? That quick? Any advice is welcome.

    Regards

    Baldur

  2. Back To Top    #2

    Join Date
    Dec 2014
    Location
    Santa Ana, CA
    Posts
    523

    Re: Chronic High PH

    Quote Originally Posted by Baldur View Post
    Folks,

    This is my second pool (so total of 15 years of pool ownership) so not a total Newbie. This latest one is a salt (mineral) system.

    I tend and care for pool myself, dont hire a service. Its a low traffic environment. Just my wife and I and a teenage son who's gone a lot, so the pool doesn't get used a ton

    My chlorine level is perfect, my salt level is perfect. I take my water in for testing at my local pool store monthly. Nothing else to worry about. No metals etc.

    But for some reason my PH levels are chronically high. I add MA and bring them down to ideal levels, but in less than a week they go right back up again.

    I have read that salt pools tend to do this, but really? That quick? Any advice is welcome.

    Regards

    Baldur
    Welcome!

    This forum usually bases its recommendation on reliable data so it would help if you provide your test numbers and test kit used to get those numbers:

    CYA=
    FC=
    CC=
    pH=
    TA=

    it would help even more if you could update your signature and include pool details, equipment and test kit name in there.
    44k plaster pool, Pentair 011018 pump, DE6020 filter, LED lights, K2006 test kit

  3. Back To Top    #3

    Re: Chronic High PH

    I too observe this as well. Its been like this for the past four years of pool ownership.

    I have a chlorine generator. I usually let the pool come up to around 7.8 - 8 ph and then knock it down to around 7.4, 1/2gal of acid does the trick. I end up using a gallon or two in a month. This is a somewhat good thing for me as my TA likes to creep up on me which causes issues with scaling on my swg.

    I have a 30k/gal pool and a solar heater.

    I have a tft kit and currently have the following numbers:

    Cya 50
    Fc 7.5
    Cc 0
    Ph 8
    Ta 80

    Just added a 1/2 gallon yesterday, so I should be in the 7.4ish range.



  4. Back To Top    #4

    Join Date
    May 2016
    Location
    MN
    Posts
    2

    Re: Chronic High PH

    Quote Originally Posted by Chris.weakland View Post
    I too observe this as well. Its been like this for the past four years of pool ownership.

    I have a chlorine generator. I usually let the pool come up to around 7.8 - 8 ph and then knock it down to around 7.4, 1/2gal of acid does the trick. I end up using a gallon or two in a month. This is a somewhat good thing for me as my TA likes to creep up on me which causes issues with scaling on my swg.

    I have a 30k/gal pool and a solar heater.

    I have a tft kit and currently have the following numbers:

    Cya 50
    Fc 7.5
    Cc 0
    Ph 8
    Ta 80

    Just added a 1/2 gallon yesterday, so I should be in the 7.4ish range.


    Sent from my iPhone using Tapatalk

    Hey Chris,

    That sounds like my situation exactly. Even have the same size pool (30K gals). All my chemistry levels / readings in the normal range, but after 4 days to a week the PH is back up to 7.8 - 8. I use muriatic acid to knock it down, but even with the pool *not in use* it will creep back up.

    What I was hoping to find out is if this is just a normal condition with a salt pool or if there is some other condition I should know about. I know I never had this issue with my previous pool (in ground approx the same size) but that pool was a normal chlorine pool.

    Regards

    Baldur

  5. Back To Top    #5

    Re: Chronic High PH

    My Ta is now 60 and my ph looks to be settling in at 7.8.



  6. Back To Top    #6

    Join Date
    May 2016
    Location
    Phoenix AZ
    Posts
    128

    Re: Chronic High PH

    Your Ph will naturally rise with a SWG. Lowering your TA to 60 or 70 will slow the rise somewhat and reduce the frequency with which you will have to add acid.

    But...

    You should absolutely get your own test kit, and not rely on pool store testing. If you are using a mineral system, you are probably adding copper to your pool. If it is not a problem now, it will be in the future, unless you are draining your pool at the end of every season. Pool store testing is notoriously unreliable and its purpose is to sell you overpriced products to put in your pool. Sometimes these will solve your problems; sometimes they will create new problems.
    50,000 gallon plaster in-ground salt pool with two 60 sq ft DE filters, two Intellichlor IC60 SWGs, two Intelliflo VS pumps, two Whisperflo pumps, two Pentair 400K BTU NG heaters, PCC2000 in-floor cleaning system...two everything.

  7. Back To Top    #7

    Join Date
    Aug 2016
    Location
    Highland MI
    Posts
    4

    Re: Chronic High PH

    I'm a newbie to the forum, but have been following TFP since my install last summer. I have the same issue with PH creep and manage it by adding acid about once per week. One thing I have noticed is that when we have the solar cover on for a few days, the problem stops and even reverses itself. As an example, we left the cover on 1 full week and PH went from 7.8 to 7.4. When we remove the cover and use the pool, PH creeps back up.
    25K gallon Leisure Fiberglass 16x40; Pentair 1.5hp pump with 150 sq ft cartridge filter, unused tablet feeder; TFP all the way!

  8. Back To Top    #8
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re:Chronic High PH

    The solar cover will reduce or prevent outgassing of co2 that leads to pH rise.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •