Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: My Pool Requires Insane Amounts of Muriatic Acid

  1. Back To Top    #1

    My Pool Requires Insane Amounts of Muriatic Acid

    Ever since we purchased our home 3 years ago, I've noticed that my pool requires an insane amount of 31.45% Muriatic Acid to keep the pH in line. I have to add 28oz of acid in my 14K gallon pool every other day to keep pH between 7.4 - 7.6. I know having a salt water generator causes pH to be higher than normal, but this just seems ridiculous. I was at my local pool store the other day buying my monthly case of 4 1-gallon jugs, and the pool owner there told me he would use that amount in 1 year.

    Here are my numbers:

    FC = 2.5
    pH = 7.6
    Alk = 75
    CH = 475 (I know this is high, but I can't do anything about it right now - in California with water restrictions)
    CA = 60
    Salt = 3700 (recently discovered my SWG is highly inaccurate)
    Temp = 83

    Does anyone have any ideas what would cause such a heavy demand for Muriatic Acid and if there is anything that can be done?

    Thanks!
    14,000 Gal. In-Ground Plaster Salt Water Pool
    Pentair IntelliFlo VS Pump
    Cartridge Filter
    Aqua Rite Chlorine Generator w/ T-Cell-3
    6-panel Solar Heater
    Purex Triton MiniMax Plus 400 Gas Heater
    Built 1999

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: My Pool Requires Insane Amounts of Muriatic Acid

    Welcome to TFP!!!

    You could raise the CYA and lower the SWG output which could slow the pH rise.
    You could try to lower the TA a little more. (Is your fill water high pH and TA?)
    You could try keeping the pH a little higher 7.6-7.8.
    You could try to add borates.
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3

    Re: My Pool Requires Insane Amounts of Muriatic Acid

    Thanks. My fill water's pH and TA is low. pH is 7.2 and I believe TA is around 50 or 60. During the summer time I pretty much have to run my SWG at 100% in order to to keep chlorine levels where they should be. What would be the advantage of keeping the pH a little higher?

    Am I wrong in thinking this is a lot of muriatic acid to have to use? What kind of environmental factors contribute to high pH levels?
    14,000 Gal. In-Ground Plaster Salt Water Pool
    Pentair IntelliFlo VS Pump
    Cartridge Filter
    Aqua Rite Chlorine Generator w/ T-Cell-3
    6-panel Solar Heater
    Purex Triton MiniMax Plus 400 Gas Heater
    Built 1999

  4. Back To Top    #4
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: My Pool Requires Insane Amounts of Muriatic Acid

    The pH does not rise as fast at higher levels. Having the SWG run that much is likely most of your pH problem.

    Your cell is way undersized. We recommend sizing 1.5-3 times the size of your pool precisely to avoid having to run the pump and SWG all the time.
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  5. Back To Top    #5

    Join Date
    Jul 2012
    Location
    Dallas
    Posts
    43

    Re: My Pool Requires Insane Amounts of Muriatic Acid

    Do you have any water features like a spa spill over? Aerating your water will increase the pH.
    26k gal, IG, Pebble Tec, DE filter/48sq'/144 GPM, 3hp Intelliflo running @ <1400 rpm 24/7

  6. Back To Top    #6

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,671

    Re: My Pool Requires Insane Amounts of Muriatic Acid

    The things I would do to help are:

    Keep the pH 7.6-7.8 range.
    Remove aeration from the pool, example; waterfalls, returns pointing up, spa spillover, etc...
    Increase CYA to 80, that will help the SWG not have to work as much. Still might not do enough because the SWG is undersized.
    Lower the TA to 60.
    Replace the T-3 cell with a T-15 cell.

    I agree that most of the pH rise is probably due to the SWG long run time. Research if you can replace the cell with a T-15 cell. There should be a calibration procedure that you can do that will adjust the electronic output of your supply. If there is an option for a T-15 cell then your unit can be used with a T-15 cell. Do a search if you do not know how to adjust the calibration. You will also save electrical money since you will only have to run a fraction of the time that the T-3 cell requires.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  7. Back To Top    #7

    Join Date
    Jan 2010
    Location
    Northern Virginia
    Posts
    282

    Re: My Pool Requires Insane Amounts of Muriatic Acid

    Add borates!

    I have the same problem as you (SWG and raising pH). I did a borate treatment last year and it helped a lot. I still have to continuously add muriatic acid, but the borate treatment cut down my usage by at least half.
    700 sq. ft./30,000 gal, gunite pool; 48 SF DE filter; 1.5 HP pump; Salt Water Generator; Solar Heat

Posting Permissions

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