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Thread: PH Trouble

  1. Back To Top    #1

    PH Trouble

    Hi Everyone,

    First time post since posting my construction story (sad, I know). This has been asked 1,000 times before but I'm hoping to get some guidance on my pool's condition.

    My main problem is constant PH at 8.2. Every time I check, I can add acid and have it back down to 7.5 (adding at least 16oz Muriatic Acid) but it never takes more than 3 days to jump right back up. I added acid yesterday and it landed at 7.5 and today (not 24 hours later) its at 7.7.

    Any guidance is much appreciated. Below is all the info to help.

    Thanks!
    D


    Current Chem (Tested on TF-100)

    PH - 7.7
    FC = 2.0 (Working on sensor issues with Aquapure, errors about 10% of time its on)
    CC = .5 (First time ever I have gotten any CCs)
    TA = 70
    CH = 450
    CYA = 25 (I was surprised this low)
    Salt = 3200


    Pool Schedule:
    Filter Pump on for 7 hours (9am - 4pm)
    SWG at 50%
    2 Foam Jets run for 2 hours

    Pool:
    Free-form In Ground, Max Width: 21'9", Max Length: 31'6", Depth: 3' to 6', Gallons: 14,773 (I don't think this includes spa, but am unsure).
    Built in Spa, 7x9 Oval, 50sqft, 6 Waterway Jets, 24" Spill Over into Pool
    2 Crystal Foam Jets
    Pentair System DE Filter
    2HP Pump - 2 Speed
    Salt System - AquaPure
    400K BTU Heater
    Jandy RS6 W/Remote & iAqualink
    15,000 gal. Free Form IG PebbleTec Pool, 50sqft Oval Spa with 24" Spill Over, 2 Crystal Foam Jets on Tanning Ledge
    Pentair 2HP, Pentair DE Filter, Aquapure SWCG, Jandy iAqualink System
    Pentair 400K BTU Heater, TF-100 Test Kit
    Pool build: new-pool-build-in-tampa-fl-updated-3-25-t54884.html

  2. Back To Top    #2

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: PH Trouble

    New plaster eats MA for lunch! Your MA usage is going to be high for a few weeks. SWG adds to the problem. Ask me how I know, I have the same two problems!
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
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    Tucson, AZ
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    Re: PH Trouble

    Please add your pool details to your signature and location to your profile as described HERE as it will help us help you.

    With a new pool surface, the pH often climbs more quickly for the first year or so. Additionally, the SWG itself causes aeration which raises the pH faster. If you have the spill over running, or using the spa, or running your water feature, that also aerates and raises the pH. On the plus side, your TA is not too high which would make it rise even faster.

    You just need to keep on adding the acid to keep the pH in range. More advanced would be to try adding borates to slow the pH rise.

    BTW, you should really get your CYA quite a bit higher. This will allow you to run the SWG less which will not raise the pH as fast.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  4. Back To Top    #4

    Join Date
    Mar 2011
    Location
    Houston, Texas
    Posts
    413

    Re: PH Trouble

    Some here report that they can finally keep pH in an acceptable range by keeping TA low.

    Perhaps if you get TA down to 60 it might help. But you just may have to keep adding MA indefinitely.

    In my case, with a spill over spa, a large pump (for the spa), the SWG, and high TA fill water, I'm constantly battling rising pH 3.5 years after construction.

    I'm still adding about a quart of MA to my pool every 7-10 days. The good news is that except for topping up CYA and Borates once or twice a year, adding MA is about the only thing I need to do to keep my numbers in an acceptable range.
    9,200 gal. Gunite Luna Quartz French Grey pool with spill over spa, two fountains on tanning ledge (rarely used)
    Pentair Whisperflo 2HP, Pentair CCP Cartridge 420 Sq. Ft., Polaris 280 with booster pump
    Pentair EasyTouch 4, RayPak LoNox 266k Natural Gas heater, Aqua Rite SWCG T Cell 9, Borates, TF-100 test kit

  5. Back To Top    #5

    Re: PH Trouble

    Thanks for the quick replies!

    So it seems I'm not off to bad with the PH then. I def. will get the CYA up this week. I was surprised it was so low. The pool is just over a year old and I guess the combination of large spa, pump, jets, waterfall are not helping the cause.

    Thanks for the reassurance. I'll invest in an MA company

    I'll update the signature.

    Thanks,
    D
    15,000 gal. Free Form IG PebbleTec Pool, 50sqft Oval Spa with 24" Spill Over, 2 Crystal Foam Jets on Tanning Ledge
    Pentair 2HP, Pentair DE Filter, Aquapure SWCG, Jandy iAqualink System
    Pentair 400K BTU Heater, TF-100 Test Kit
    Pool build: new-pool-build-in-tampa-fl-updated-3-25-t54884.html

  6. Back To Top    #6

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: PH Trouble

    Once you invest, send me some free cases.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

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