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Thread: My readings

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    KING-OLE's Avatar
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    May 2014
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    My readings

    Just opened up my SWG pool 2 weeks ago after it having been covered for about 9 months.

    It looked good the first week but then began to turn green, so I shocked it about 3-4 days ago, which made the green go away again.

    I just now tested the water with my test kit, and got the following numbers:

    • FC = 2 ppm
    • CC = 0 ppm
    • TA = 150 ppm
    • CYA = 30
    • CH = 200 ppm
    • pH = 7.7


    There are several values that I need to adjust.

    Which order and with how much time apart would you recommend that I approach this?

    Thanks,

    Ole
    Specs: IG plaster (≈35K Gallons) SWG (Pentair IntelliChlor)
    Pentair FNS Plus 60 DE filter, Pentair 2HP Main Pump + Polaris PB4-60 Booster Pump
    Please forgive me if above question is stupid, but my (current) knowledge about chemistry is about the same as my ability to fly!

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    Richard320's Avatar
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    Re: My readings

    Did you "shock" as a one-time blast, or did you do the whole SLAM process?

    It makes a difference in what I'd recommend, so be honest.

    If it was SLAMmed and passed the OCLT, then raise CYA to 70 and possibly raise FC using bleach to about 5 so the SWG can catch up. The CYA is mildly acidic which will reduce pH and TA some, so everything else should be fine

    If it wasn't SLAMmed, then it probably should be, even if it only takes a day to pass the overnight loss test. In which case, you want to lower the pH first and leave the CYA low until after it's done and hit the pool hard with bleach now. Pool School - SLAM - Shock Level And Maintain
    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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    KING-OLE's Avatar
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    Re: My readings

    Thanks Richard.

    I did not SLAM it - only shocked it.

    Before your reply, I read up on the notes here, and got some stabilizer and liquid chlorine.

    I've added both as well as cleaned the SWG cell in M.A. and set it to 100%.

    Will test the numbers again tomorrow morning and see where it's at.
    Specs: IG plaster (≈35K Gallons) SWG (Pentair IntelliChlor)
    Pentair FNS Plus 60 DE filter, Pentair 2HP Main Pump + Polaris PB4-60 Booster Pump
    Please forgive me if above question is stupid, but my (current) knowledge about chemistry is about the same as my ability to fly!

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