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Thread: Cloudy water after adjusting CYA

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    Cloudy water after adjusting CYA

    Hi there,
    Before we go to my question a little bit about me:
    I bought a house with a fiber glass pool last July. I never had a pool before, so I went to the pool store to get water tested and my chemicals.
    I found this awesome site shortly after and now I am able to maintain my pool with the help of your advise in pool school and in the threads.
    Awesome job guys and thanks for having a webpage like that.

    I wanted to get my level adjusted to whats recommended in Water Balance for SWGs.

    Tech data:
    Pool 22000 gallon fiber glass and SWG
    SWG salt level at 3400 (2600 - 3200 rec)
    Use the TFT test kit
    Use pool calculator for calculating adjustments

    Measurement 13th June
    FC 3
    PH 7.2
    TA 40
    CH 30
    CYA 20

    I adjusted CYA first as recommended with solid stabilizer (wallmart brand 100% cyanuric acid) on the 13th.

    Measurement 14th June
    FC 5 (had pump running 24h with pool vac to mix it)
    PH 6.8
    TA 40
    CH 30 (need to adjust but waiting for online order to arrive as I need a ton of it)
    CYA 70-80 (success)

    On that day I noticed that the Water was very cloudy and was wondering if this comes from the stabilizer still floating around or from algae?

    Then I wanted to tackle PH and TA so I added 20 mule Borax.

    Measurement 15th June
    FC 5
    PH 8.2 (used pool calculator as always for it targeted 7.6 and that didn't quite work out so well. Need to add Muriatic acid to lower this afternoon. Then I also wanted to tackle TA after measuring it as Borax will probably raised it).
    Wife did measurements this morning. I need to do full measurements when I am home this afternoon from work.
    Also wife reported that cloudiness seams to be gone almost completely.

    It would be great if some one could look at this and tell me if the CYA change introduced Algae into my pool and if I need to do anything now to prevent this from getting worse.
    Thanks guys.
    22000 gallon fiber glass Pool, 1HP Hayward pump , Sandfilter, Goldline T-15 SWG,
    Home brew coil Solar System http://builditsolar.com/Projects/Poo...ol_heating.htm,
    TF-100 test kit

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Cloudy water after adjusting CYA

    Cloudiness will not happen because of CYA, except indirectly if the increased CYA level means your FC level is too low and algae gets going.

    You need to get your PH under control. When making large changes don't used the entire calculated dose at once. Instead use half or two thirds, let it mix in, test again, and continue adjusting from there.
    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

  3. Back To Top    #3

    Re: Cloudy water after adjusting CYA

    Hi JasonLion,
    thanks for your reply. I didn't know that I couldn't do it in one go.
    Yes, I wanted to tackle the PH this afternoon.

    It there anything in addition that I need to do right now because of the past cloudiness?
    How do I know if I have algae right now?
    Is cloudiness a normal process that happens once in a while in the pool eg. when you have a lot of people in it or is this the first warning sign that something isn't right?
    22000 gallon fiber glass Pool, 1HP Hayward pump , Sandfilter, Goldline T-15 SWG,
    Home brew coil Solar System http://builditsolar.com/Projects/Poo...ol_heating.htm,
    TF-100 test kit

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Cloudy water after adjusting CYA

    Cloudiness shouldn't happen if everything is going correctly. The most common cause of cloudiness is algae that is just starting. There are also a hundred other things that can cause cloudy water, all much less likely. Cloudiness, or even just a slight loss of sparkle, is a good warning sign that something is going wrong.
    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

  5. Back To Top    #5

    Re: Cloudy water after adjusting CYA

    Cloudiness is gone after I upped chlorine and got all values in the right area.

    FC 5
    PH 7.6
    TA 85
    CH 250
    CYA 80

    Sparkling clear pool.
    Temp is 87 with the new solar system.
    Family and neighbors love it.
    22000 gallon fiber glass Pool, 1HP Hayward pump , Sandfilter, Goldline T-15 SWG,
    Home brew coil Solar System http://builditsolar.com/Projects/Poo...ol_heating.htm,
    TF-100 test kit

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