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Thread: Numbers not changing... need help!

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    Numbers not changing... need help!

    My pool has been looking great, but it is starting to take a cloudy turn. I have added the recommended MA, but my numbers are not changing.

    About three months ago we had a new liner put in and I installed an Intelichlor IC40 SWG. My fill water has very high PH, so I went ahead and stocked up with MA. I have added around 4 gallons of MA over the last month or so typically a gallon at the time and my PH and TA will not come down. None of my returns are breaking the surface of the water, so I am not aerating... I don't know what is going on.

    I am currently running my pump around 12 hours a day and my pool has direct sunlight from early morning until late afternoon. Current water temp is 90. I know my chlorine is low and will change my schedule to run longer to compensate.

    I also test with a Taylor 2006 kit and my numbers are listed below. Any suggestions are welcomed.

    FC = 1
    CC = 0
    PH = 8.0 + (very pink)
    TA = 200
    CH = 50
    CYA = 60
    Salt = 3200
    26,000 vinyl IG pool
    Hayward 300lb sand filter
    1 1/2 HP pump
    Jacuzzi Tracker

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    Richard320's Avatar
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    Re: Numbers not changing... need help!

    After 4 gallons of acid, that TA is still sorta high. I wonder what it was initially?

    Sorry to tell you this, but you're going to need to keep adding acid. Eventually things will come into range. (Just a thought: you didn't accidentally buy the half-strength MA, did you?) There is a disclaimer on Pool Calculator that says, "Results are approximate and can be off significantly for large pH changes." But it should take only a little over 2 qts of 31% acid to get you to 7.5 pH. The high TA will drive that back up again quickly, so I recommend adding acid, brush a bit to get it all well mixed (pump on, of course) and recheck pH in half an hour or so and see what it reads then. At least you'll know it is possible, if only for brief periods.

    You might also take a gander at the bottom of Pool Calculator for "Effects of adding chemicals." You'll see that 2 qts of acid will drop pH all right, but TA will only go down 4.8!! So it's going to take a loooooooong time and a lot of acid to get that 200 down to 80 or so.
    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.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Numbers not changing... need help!

    Thanks for the quick reply Richard.

    My initial reading for TA was 240. Also, I am using the full strength 31% MA. I guess it will just take a while like you said. I just wanted to make sure I am doing everything I should be.

    As far as adding MA goes, how much can I add at one time and how often can I add it? Thanks again for the help.
    26,000 vinyl IG pool
    Hayward 300lb sand filter
    1 1/2 HP pump
    Jacuzzi Tracker

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    Re: Numbers not changing... need help!

    Just keep adding the amount that the PC estimates will give you a 7-7.2 ph. Give time to mix thoroughly, test and repeat as necessary.
    17,000 gal, IG Gunite Diamond Brite plaster Kidneybean,w/7x11 tanning ledge& 3x5 swimout bench,244T 300lb Hayward Pro high rate sand filter(63 GPM) , Hayward 1Hp Super Pump w/3/4 hp booster pump, Polaris 280, Laars Lite 2 175k N/G Heater, Tf-100, Speed stir

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    Richard320's Avatar
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    Re: Numbers not changing... need help!

    Quote Originally Posted by ovranalyzr
    Thanks for the quick reply Richard.

    My initial reading for TA was 240. Also, I am using the full strength 31% MA. I guess it will just take a while like you said. I just wanted to make sure I am doing everything I should be.

    As far as adding MA goes, how much can I add at one time and how often can I add it? Thanks again for the help.
    I'd just follow the directions here: pool-school/lowering%20total%20alkalinity

    You can go for serious aeration and run through a lot of acid fast and get TA down fast, or just continue the way you have been and run through a lot of acid slow and get TA down slow. The important thing is to keep pH between 7.4 and 7.8, however often that means adjusting. If you devote a weekend to reducing TA, you'll probably be able to stay in range for a few days at a time after TA is down below 100.
    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.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Numbers not changing... need help!

    Will do. Thanks everyone. Guess I am just not being patient enough.
    26,000 vinyl IG pool
    Hayward 300lb sand filter
    1 1/2 HP pump
    Jacuzzi Tracker

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    Richard320's Avatar
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    Re: Numbers not changing... need help!

    So be impatient - lowering TA is one of the few things you can speed up! Look at some of the links in that article, head over to the hardware store tomorrow and get some PVC pipe, and spend your weekend aerating. Last year, Poolgirl set up a submersible pump with a lawn sprinkler to aerate.

    If you don't drop pH below 7.2, the kids will love splashing around with a fountain in the pool! Once an hour, kick 'em out for a potty break and snack, test, add acid, mix it around a little, and let 'em back in.
    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.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Numbers not changing... need help!

    The cloudiness in your pool is likely caused by the lack of CHLORINE....not your pH.

    I would suggest putting in as much acid as it takes to get your pH into the 7's (regardless of how much it takes) and, then secondly, there is a good chance you need to shock the pool because you lack chlorine.

    Bring your FC up to around 6-8ppm and if the cloudiness does not correct itself in a day or so, you will need to shock.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Numbers not changing... need help!

    Yeah, I need to pick up some bleach as well to do some shocking.

    In all honesty, I just didn't realize how much MA it is going to take. Thanks again for all the help. This forum is awesome because of all of you!
    26,000 vinyl IG pool
    Hayward 300lb sand filter
    1 1/2 HP pump
    Jacuzzi Tracker

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