Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: PH keeps increasing...

  1. Back To Top    #1

    Join Date
    Jun 2015
    Location
    Blue Bell, PA
    Posts
    7

    PH keeps increasing...

    In early June this year we had our pool renovated including new plaster, coping and tile. I'm following the TFP method adding bleach daily, testing ph and chlorine daily and the full battery of tests 2x per week.

    im adding about 64oz of muriatic (31 baume) about every 2-3 days to bring the ph down. The ph creeps up to 8.0 and then I bring it down to 7.3-7.4.

    Is it normal for Ph to still be increasing when my pool plaster was completed 3minths ago? Any suggestions would be appreciated.

    Here are my latest test results using the TFT100 kit:

    FC 4.0 TC 4.0. CC 0.0
    ph 8.0
    calcium 350
    TA 80 (I eg been bringing this to 90 when it drops below 80)
    cyh 35

    Thanks in advance!
    30k gallon, replastered (June '15), 1.5hp Hayward Super Pump, Hayward 60 sq ft DE filter, Hayward chlorinator, Rheem 406k heater.

  2. Back To Top    #2
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,966

    Re: PH keeps increasing...

    Yes, as noted on the TFP Pool School - Start-up New Plaster page, new plaster will consume a lot of acid in the 6-12 months as the plaster continues to cure. The fact that you have also been raising TA to 90 on a regular basis may also be pulling the pH as well since TA serves as a buffer for pH. Using the Poolmath calculator , you may wish to examine the thought of allowing your TA to rest a little lower which may in-fact help keep your pH from rising so fast. Compare the CSI range on the calculator to ensure you're still within the -0.6 to .6 acceptable ranges as applicable. And don't forget that any aeration you may have (if any) will also contribute to elevating pH. Hope this helps.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  3. Back To Top    #3
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,998

    Re: PH keeps increasing...

    +1 to letting your TA drop. As low as 50 or 60 is fine and it will help to stabilize your PH. It is important to keep your PH between 7.2 and 7.8 at all times in all pools. It is very important to keep it at 7.8 or lower in newly plastered pools. It can take up to a year for the plaster to fully cure.
    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

  4. Back To Top    #4

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,084

    Re: PH keeps increasing...

    +2 Let your TA drop 50-60 is fine.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    Join Date
    Jul 2014
    Location
    Berks County, PA
    Posts
    206

    Re: PH keeps increasing...

    I might add that it can take even longer than a year for the new plaster. My pH is still going up and it is now just about 14 months since it was replastered. Unless my increase is now due to some other reason. Being that noone else mentioned this yet - I might suggest to continue monitoring the pH during the off-season. I used to pull my winter cover back partway every few weeks, check the water, add diluted dry acid, and then agitate the water around real well (kayak paddle worked great). Then recheck again in a few days or so. I had to keep lowering the pH until I couldn't any longer due to the water eventually freezing. Even then one time I punched through about an inch of ice just enough so I could get some water and test it. In retrospect I'm really not sure why I bothered to do that since no matter what the reading was I could not have done a thing about it anyway!! Just overly paranoid about developing scale I suppose. If your new plaster is ever going to scale, it is generally during the first winter following a renovation. As was already suggested, it is important to check your overall CSI.
    12,000 gal. Anthony IG pool; 3 ft. shallow end to 6 ft. deep end; Built 1989; Renovated July 2014 using a 10-part unexposed quartz plaster aggregate of 3 S-grade Blue, 3 S-grade Gray, 2 T-grade Blue, 2 T-grade Gray; Apollo VA-52 DE Filter; Hayward SP-2607X10 Super Pump 1-HP Single Speed; Jandy AE-Ti Heat Pump; Taylor K-2006 Test Kit

  6. Back To Top    #6

    Join Date
    Jun 2015
    Location
    Blue Bell, PA
    Posts
    7

    Re: PH keeps increasing...

    Thanks everyone for the advice.
    30k gallon, replastered (June '15), 1.5hp Hayward Super Pump, Hayward 60 sq ft DE filter, Hayward chlorinator, Rheem 406k heater.

Posting Permissions

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