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Thread: What to Adjust First?

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    What to Adjust First?

    Hello Everyone,

    Well, just got a new liner installed, thanks to a leak over the winter which resulted in my vinyl liner shrinking. The pool company "balanced" the water. In hindsight I should have told them I'd do it myself. But, I was thinking the "free chemicals" would be good. Oh well, here are the results of my first test with the TF100 kit.

    FC over 40... They must have decided to shock the pool, I don't know how much chlorine they added, but I added 80 drops and still pink. one drop in the K-1000 kit gave a high reading!
    CC ?
    TC ? unable to read do to above
    PH Way high, K-1000, added only two drops of red and color was about right.
    TA 230
    CH 70
    CYA <20

    So, based on above I'm going to let it settle for a day, since they just added chemicals today. But, if PH and TA stay the same, what would you do suggest?

    Thank you
    14'x28', 13K Gallons, Vinyl, DE, TF100 Test Kit

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    duraleigh's Avatar
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    Re: What to Adjust First?

    The pH test will never be accurate in the presence of chlorine that high. Please examine your liner carefully....that much FC without the buffering of CYA may have done some damage (bleaching) to it. I would never let them touch the pool again....that is careless.

    I don't think ther is anything you can do until FC drops back down to around 10ppm then test pHagain and post.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: What to Adjust First?

    Thanks for the quick response. Do you think I should add some Chlor out tonight, or ride it out until tomorrow. I'm hoping to see it drop significantly, but don't want to chance the liner being damaged. I'm going to call them tomorrow morning to figure out exactly what they added.
    14'x28', 13K Gallons, Vinyl, DE, TF100 Test Kit

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    Mod Squad jblizzle's Avatar
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    Re: What to Adjust First?

    Let the FC drop below 10ppm and verify the pH (not valid at high FC levels) ... that is so typical of pool companies to drop a chlorine nuke ... for absolutely no reason if it was a clean fill.

    Any idea how much CYA they added? What did they raise the FC with as that may have also added CYA?
    Test that after a week and see where you are at and adjust to 30-50ppm.

    Then maintain appropriate FC and start the Lowering TA process in Pool School.
    Jason, TFP Moderator
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    Re: What to Adjust First?

    It was a clean fill. Water is crystal clear. I'm kicking myself for not telling them to just leave it alone. I'm going to find out what product they used tomorrow, but my CYA is reading very low. I basically used the entire CYA test bottle in the tube and could barely see the black dot. That's why I posted < 15 above. I guess I'll just retest everything tomorrow.

    Thanks
    14'x28', 13K Gallons, Vinyl, DE, TF100 Test Kit

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    Re: What to Adjust First?

    How long ago did they add chlorine? Did they use powdered shock? It can take at least a week to get an accurate CYA reading. I would wait and retest CYA at least a week after their last addition.
    18'x48" AG
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    Re: What to Adjust First?

    The pool was filled overnight and they added chemicals today. I didn't see them add it, so I have no idea if it was powder or liquid. I guess I'll just ride out the chlorine coming down and retest all levels.
    14'x28', 13K Gallons, Vinyl, DE, TF100 Test Kit

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    Re: What to Adjust First?

    OK, so I'm much better today... Need to do a full test after work to see where I stand, but this morning my FC is down to 8 and my PH is 7.6.

    Talked to a woman at the pool company and she said the adjusted Alkalinity, put it 8 lbs of stabilizer and added only two gallons of shock. I find it hard to believe that they only added two gallons. There was no sense arguing with her, as she was only reading what was on the slip the workers handed to her. But two gallons of shock in 13,000 gallons giving me a reading or over 40 FC? I doubt it.
    14'x28', 13K Gallons, Vinyl, DE, TF100 Test Kit

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    Re: What to Adjust First?

    Nope, if they used 10% liquid, it would have put you at 15 ppm.
    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
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    Mod Squad Bama Rambler's Avatar
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    Re: What to Adjust First?

    2 gallons of 12.5% would have barely got you half way there. They probably dumped 5 gallons in there and just wrote down 2.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: What to Adjust First?

    Yeah, that's what I'm thinking 5 or 6 gallons.. I'm very interested to see what the CYA level will be based on the stabilyzer they added. I know I have to wait a week to ensure that's accurate. But, if it's low, say under 20, what are the board's thoughts on using the chlorine pucks to gradually raise the CYA? And then switch back to just liquid chlorine when it's at a good level? I already have the chlorinator hooked up, which I haven't used for the past two years, since discovering this site.

    Thank you
    14'x28', 13K Gallons, Vinyl, DE, TF100 Test Kit

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    Mod Squad Bama Rambler's Avatar
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    Re: What to Adjust First?

    AS long as you know what it's doing, it's fine to use the pucks, especially if you already have them.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: What to Adjust First?

    If you are truly at 20, there's no reason you can't use pucks, it'll just take longer. But, if you already have the pucks, and they can maintain your FC level even at low CYA, then by all means use them!
    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
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    Re: What to Adjust First?

    Quote Originally Posted by rsfan14
    Talked to a woman at the pool company and she said the adjusted Alkalinity, put it 8 lbs of stabilizer and added only two gallons of shock.
    I hope that 8 lbs of stabilizer was a mis-print. For that size pool you'll be up around 75 for CYA. You may want to verify that amount with them.
    Dan

    Edit: unless you have a SWG, then it ok.
    16' X 24' Wilkes Pools "Genesis", 10K Gal
    Hayward Powerflo Matrix 1 hp, & 18" Pro Series sand (S180T)

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    Re: What to Adjust First?

    Thanks guys, I only know what they told me, I'm not trusting anything. I know I'm going to give the CYA some time before trusting the reading. Will use liquid Chlorine for daily maintenance and use up the old pucks if the CYA is low.
    14'x28', 13K Gallons, Vinyl, DE, TF100 Test Kit

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