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Thread: High PH after adding acid, 0 CYA....

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    High PH after adding acid, 0 CYA....

    Hello guys.

    Levels are: (taylor kit)
    TC 1.5
    PH 8.1
    TA 150ppm
    Calcium 240ppm
    CYA 0

    I put 1 gal of muratic in it about 2 weeks ago and NADA!! The ph is still freaking high.

    The pool is new as of November 2009 and is Pebble sheen. Not sure if this is causing the ph to rage!!

    I just took over the chem duties.

    So, I checked the calculator and it says to add 374 ounces of liquid stabilizer???? I'm not a math wiz but that looks like 3 gallons?????

    This freaking stuff seems complicated.
    54'X26', 9'x7' Spa, Gunite, Pebbletech Blue Granite, Pentair Equipment, 520 Cartridge filt., SWG, 320 chlorinator (just in case), Easy touch 8 control, 2 1/2 hp pool pump, 400k Mastertemp Heater, Polaris 280 on 3/4 hp pump, 22' x 4' Moss rock waterfall, and weaping wall 2.5hp, 10x8 Flagstone island with 3 fountain jets w/ 2.0hp. 28k gallons.

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    Richard320's Avatar
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    Re: High PH after adding acid, 0 CYA....

    ****, that's a big pool! Have you checked your math? If the pool is the size you say and it's only 4' deep throughout the entire length, that's more like 42,000 gallons, not the 28000 you say.

    The calculations sound right to me. My pool is half that size, and I added 10 lbs of dry acid and about a gallon of liquid later. Now the pH is steady. I think I added a cup in the last month. I remember this much from high school chemistry: pH is logarithmic, like earthquakes. 8.1 is ten times stronger than 7.1. So every point is a sizeable jump.

    Watch the testing when you test calcium and you'll notice something. You add a lot of drops and they disappear. As you start to get near the end you get a cloud of color that only disappears when swirled. Then that one drop changes everything. It's going to be like that with the acid: add and add and add and suddenly, it's there!
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: High PH after adding acid, 0 CYA....

    Take it one parameter at a time and it will get very easy. Start with pH. Keep adding muriatic acid until your pH gets down to around 7.4. The changes will occur usually within 30 minutes of you adding acid so it won't take two weeks.

    If the pH goes back up (you should be testing daily) keep adding muriatic to brin it back down to 7.4....very simple..Once you get your pH down into the mid 7's then you can work on the liquid stabilizer (which is totally unrelated to pH....it's CYA)

    While you are adjusting pH, read the ABC's of pool water chemistry in pool school.......it'll help.

    Post back when your pH is stable and we'll help adjust your parameters one by one.....it'll be easier than you think.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    polyvue's Avatar
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    Re: High PH after adding acid, 0 CYA....

    Quote Originally Posted by bears831
    Levels are: (taylor kit)
    TC 1.5
    PH 8.1
    TA 150ppm
    Calcium 240ppm
    CYA 0

    I put 1 gal of muratic in it about 2 weeks ago and NADA!! The ph is still freaking high.
    The pool is new as of November 2009 and is Pebble sheen. Not sure if this is causing the ph to rage!!
    I just took over the chem duties. So, I checked the calculator and it says to add 374 ounces of liquid stabilizer???? I'm not a math wiz but that looks like 3 gallons?????
    Relax -- you're going to be fine. If your plan was to increase cyanuric acid (CYA - also known as stablizer or conditioner) by about 40 ppm that sounds about right. If you haven't already purchased the liquid stabilizer, you should consider purchasing the dry granules instead. They're less expensive and just as convenient. Discount Pool Supplies has 7 lb tubs of CYA on sale for $27.38 each, shipping included. It takes about 10 lbs of the dry stuff to match 3 gallons of liquid conditioner. (If you add the dry granulated CYA instead of the liquid conditioner that will also lower the pH --- a two for one deal!)

    You didn't say what the temperature of the water was -- but I can guess that it's probably not 80 degrees. A pH level that wants to go up is expected in a newer pool, so no problem there. Add small doses of muriatic acid every few days rather than once a week. Have you already added salt to the pool? If so, so much the better, though the salt water cell probably won't be producing any chlorine for a while with the temperatures we've had across the country. Spend a little time in Pool School. I don't think there are any math quizzes in there... but if I'm wrong, feel free to ignore them.
    14,555 gal in-ground 16'x29' white plaster Pool w/spa (2007); Goldline Aqua Logic AQL-PS-8 control w/Aqua Cell 15 Salt Water Chlorination (SWCG); Hayward TriStar 1HP (1.85 SF) main / 1.5HP (1.60 SF) spa pumps; Hayward Swimclear cart filter C4025, ColorLogic LED lights; Tankless SP-18-4 electric heater; Polaris 280 cleaner.
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    JasonLion's Avatar
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    Re: High PH after adding acid, 0 CYA....

    With a fresh plaster/pebble finish the PH, TA, and CH levels will go up constantly for up to a year. Cold water slows down the process significantly, so keep an eye on the PH as the water warms up. High TA levels also cause PH to rise.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    frustratedpoolmom's Avatar
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    Re: High PH after adding acid, 0 CYA....

    You should be testing the PH every day or at least every other day and adding acid as needed to maintain the recommended levels.

    Do not spend money on liquid stabilizer. It is simply not worth the added expense, just use the granular.

    When you say Taylor kit, TC.... do you have a way to test for Free chlorine too?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
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    Re: High PH after adding acid, 0 CYA....

    Quote Originally Posted by frustratedpoolmom


    Do not spend money on liquid stabilizer. It is simply not worth the added expense, just use the granular.
    You are right on this of course. But I use the liquid a lot since i'm an impatient sort.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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    Brentr's Avatar
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    Re: High PH after adding acid, 0 CYA....

    Quote Originally Posted by JasonLion
    With a fresh plaster/pebble finish the PH, TA, and CH levels will go up constantly for up to a year. Cold water slows down the process significantly, so keep an eye on the PH as the water warms up. High TA levels also cause PH to rise.
    bears831, Jason is correct. Our pool is about 6mths old and the pH continues to rise every week. I have noticed that I do not have to add as much muriatic acid as before, nevertheless I will have to add acid till the pool fully cures. Get in the mode of checking the pH every week at least and start a log of everything you do. You will find that you will eventually predict what and when you have to add chemicals. It take me minutes with my Apollo magnetic stirrer. Soon your pool will stabilize
    5,775 gal, IG free form, Beach Series Antigua by Marbletite Pebble finish, 2 swim out benches, Sheer Descent, IG Fountain, Dolphin / Mermaid Statues, StaRite Dura- Glas 1.5hp pump, Hayward Pro Series Sand Filter replaced with Hayward Pro-grid DE4820, Aqua Rite SWG with T-Cell 15, Polaris 360, Pentair 300w Light upgraded to Pentair IntelliBrite (OMG what a huge difference) , Heat Siphon Heat Pump DX 5.0 109,000 btu, Pool Cage, 1800sq ft Tremron Estate Pavers, solar cover, TF-100 test kit, Pentair Deck Jet, Apollo Magnetic Stirrer (Makes testing a breeze), Aquatherm Ecosun Solar Panels 192 sq ft with GL-235 Controller,Margarita Concoction Machine,
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