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Thread: New home with green pool

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    New home with green pool

    Bought our home last fall and the pool was not opened in around 2 years. The liner fell in the pool during a storm in Feb and left me with a mess. I have most of the debris out of the pool, but am struggling with opening. I would like to use the BBB method if possible and am hoping for some guidance as to where to proceed.

    I have been working on shocking the pool for several days now. I placed an order for the TF-100 kit, but until it arrives, I have test strips and pool store readouts.

    Current numbers:
    TC: 9.5
    FC: 7.5
    pH: 6.2
    TA: 13
    Hardness: 70
    CYA: pool store did not test for CYA
    Size: Approx 23,000 gal 16x32 Grecian
    Liner: Vinyl

    The pool store recommended hundreds of dollars in chemicals of course, so I am hoping that someone can give me some better advice on where to go. The green has started to clear up more since I added more shock yesterday, so I think I need to start getting my other numbers in line.

    Which do I need to work on adjusting first? TA?

    Thanks in advance for the help.
    16x32 Grecian (23,000gal) - vinyl
    36 sq ft DE filter

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
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    Re: New home with green pool

    Welcome to TFP!

    Don't worry about anything but chlorine, removing any debris in the water and keeping the water flowing through the filter now. You really need to know if you have CYA, but try to hold your chlorine at 15ppm until you have an answer. here is a good place to start: Turning Your Green Swamp Back into a Sparkling Oasis
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
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  3. Back To Top    #3

    Re: New home with green pool

    That was going to be my focus until the pool store guy told me not to add more chlorine, but get the levels balanced. I didn't think that what he said matched up with what I've been reading on here. He was starting to stack up buckets of chemicals before I noticed and told him to stop. Since I'm at an FC of 7.5 I should probably add a few gallons of bleach then I guess.

    Should I bother getting baking soda for the pH or just wait until it is completely done shocking?
    16x32 Grecian (23,000gal) - vinyl
    36 sq ft DE filter

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    Mod Squad JohnT's Avatar
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    Re: New home with green pool

    Quote Originally Posted by Baub
    Should I bother getting baking soda for the pH or just wait until it is completely done shocking?
    Wait until you are done shocking. Higher chlorine levels can interfere with the pH test, so you could end up adjusting it the other way when you are done.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Richard320's Avatar
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    Re: New home with green pool

    Welcome!

    I foresee a clear pool at minimum expense for you, ever since I read, " I didn't think that what he said matched up with what I've been reading on here. He was starting to stack up buckets of chemicals before I noticed and told him to stop."
    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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    JasonLion's Avatar
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    Re: New home with green pool

    It is very important to know your CYA level, since that determines how much chlorine you should add.

    Also, how confident are you in that PH reading? Most of the common PH tests will measure anything below 6.8 as if it was 6.8. The TA reading is also potentially suspect. If the PH and TA numbers are actually correct, you will want to adjust them soon. You don't normally need to adjust PH or TA before shocking, but if they are really that far out of range you will want to get them up to some minimum numbers before you go too much further.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: New home with green pool

    The pH reading on the paper shows <6.2. The TA reading is exactly from the printout of the analysis that was done at the pool store. Should I add baking soda to bring the pH up?

    I will take another sample to the pool store tomorrow if I can to get the CYA reading. For some reason they didn't test for it, but they can because it's on the printout with "Not Tested". My test kit should be here soon so I don't have to bother taking it there.
    16x32 Grecian (23,000gal) - vinyl
    36 sq ft DE filter

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    Re: New home with green pool

    I'm going to take another sample to the pool store today and make sure they get a CYA reading. I'll post the results once I have them. Can't wait for my TF-100 kit to get here so I can avoid the upsell. I added more 4 more liters of bleach last night, so hopefully the FC levels are good for now.

    Thanks for all the help so far.
    16x32 Grecian (23,000gal) - vinyl
    36 sq ft DE filter

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    Re: New home with green pool

    Finally got my TF-100!

    FC: 10.5
    CC: 1
    TA: 90
    pH: 6.9
    CYA: close to 0

    The pool cleared up nicely with some effort cleaning leaves from the bottom. I had to mostly rely on test strips since I hate being upsold every time I talk to the pool store for a water test. I'm going to check the chlorine levels in the morning, but I think I might be finished shocking. The water looks great. The only thing that looks odd is the staining on the liner. I did the vitamin C test and it's iron.
    I know I need to let the FC levels drop before doing an AA treatment, so if the overnight test is good, I'll take care of the stain next.

    Is there anything I need to take care of before I do the AA treatment?
    16x32 Grecian (23,000gal) - vinyl
    36 sq ft DE filter

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    Smykowski's Avatar
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    Re: New home with green pool

    Couple of things....

    If your CYA is truly zero, 10.5 is too high for FC.

    6.9 is way too low for pH.

    If your CC reading is greater than .5, you need to continue shocking.

    Bring your pH up to 7.2, add enough stabilizer to bring CYA up to 30, then continue the shock process until you meet all three criteria:
    -water is crystal clear
    -overnight chlorine loss of 1 or less
    -CCs 0.5 or less
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
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    frustratedpoolmom's Avatar
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    Re: New home with green pool

    If you are sure you are going to do the AA treatment don't bump the PH up just yet - read the process again, it calls for PH to be 7.0. Get some CYA in there pronto. I wouldn't hold shock for too long without some CYA in there, don't wanna bleach out your liner.
    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: New home with green pool

    Checked this morning and got a good overnight reading.

    FC: 9.5
    CC: .5

    I'm hoping the FC levels drop a good bit today in the sun since I have no CYA. I'm gonna do the AA treatment and then dump stabilizer in as soon as I can pick up some AA.
    16x32 Grecian (23,000gal) - vinyl
    36 sq ft DE filter

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    Re: New home with green pool

    Baub,

    Please do not be offended by my directness.

    You are nowhere near ready to do an AA treatment.

    From your posts, it is not clear you know where your five important parameters should be. Getting some CYA in your pool is FAR more important than working on your stains.

    You will have much better success with the AA treatment if you slow down a bit and get your pool balanced as it should be.

    Letting us know the City and State in which you live is helpful, too, when suggesting CYA ranges.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: New home with green pool

    I'm not offended by your directness. Thanks for the honesty. I figured the lack of CYA would be ok since I needed to burn off the chlorine for the AA treatment. I'll get some stabilizer in the pool today.

    I live in Macungie, Pennsylvania.
    16x32 Grecian (23,000gal) - vinyl
    36 sq ft DE filter

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    Re: New home with green pool

    In your neck of the woods, I would suggest a CYA of 40 to start, perhaps moving to 50 ppm in the late summer if your FC consumption goes much above 2-3 ppm daily.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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