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Thread: Possible Chemistry issue.

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    Join Date
    Sep 2009
    Location
    Lathrop, California
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    8

    Possible Chemistry issue.

    Since I installed my SWG I have small white particles that are accumilating in my spa and pool. They look like a white gel or soft flake substance. They are not floating freely but settle to bottom of step or spa and accumilate in a pile. I dont see them in my main pool possibly due to the floor cleaner.. Any ideas on this on what this might be. I took a sample top Leslie pool and they said it could be the saly is removing the calcium at the water line..
    Mike T..
    1997 gunite white plaster 24x36 double kidney shape pool with attached spa ~25,000 gallons.
    Hayward PRO DE 6020, Sta-Rite 2 hp two speed pump, P4 Digital Controller, Navigator cleaner.

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    Butterfly's Avatar
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    May 2007
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    Re: Possible Chemistry issue.

    Hi diy,

    Posting a full set of test results will help responders give good info .

    You could do a google search (bottom left) for "white flakes" and find some info.

    It could be calcium coming off your cell when it reverses polarity, but the test results will fill in the blanks.

    You might also want to check out Pool School for Water Balance Tips for SWGs.


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    polyvue's Avatar
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    Re: Possible Chemistry issue.

    Quote Originally Posted by doityourself
    I took a sample top Leslie pool and they said it could be the saly is removing the calcium at the water line..
    Really? The salt removing the calcium? Well, give them credit for some imagination... this seems to me a novel suggestion, but I wonder if Leslie's thought they were looking at salt crystals or calcium?

    By posting test results (including Total Alkalinity and Calcium Hardness) it will give responders a better sense as to whether water balance (chemistry) is a contributor to this material. Just based on your description it sounds like cyanuric acid (CYA) or residue from some other type of combination shock powder or tablet, but that's only a wild guess. Without knowing the pool chemistry I could also conjecture space dust that prefers to aggregate in little piles inside spas!
    14,555 gal in-ground 16'x29' white plaster Pool w/spa (2007); Goldline Aqua Logic AQL-PS-8 control w/Aqua Cell 15 Salt Water Chlorination (SWCG); Hayward TriStar 1HP (1.85 SF) main / 1.5HP (1.60 SF) spa pumps; Hayward Swimclear cart filter C4025, ColorLogic LED lights; Tankless SP-18-4 electric heater; Polaris 280 cleaner.
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    View of spiral galaxy in Ursa Major NGC6217 - Hubble Telescope 2009

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    Join Date
    Sep 2009
    Location
    Lathrop, California
    Posts
    8

    Re: Possible Chemistry issue.

    I went to the LPS and had water tested since I only have a basic test kit which I will replace very soon with a more extensive kit to perform all test needed to track my pools chemistry. The water here where I live is as hard as granite I am contemplating installing a water softener just for the pool. I drained 3 feet of the pool in July/Aug.

    FC= 3.0
    TC= 4.0
    PH= 7.4
    TA= 110
    CH= 450
    CYA= 25
    Phos= 100
    Salt= 3200 by test strip
    Salt =3100 reading on SWG display
    Mike T..
    1997 gunite white plaster 24x36 double kidney shape pool with attached spa ~25,000 gallons.
    Hayward PRO DE 6020, Sta-Rite 2 hp two speed pump, P4 Digital Controller, Navigator cleaner.

  5. Back To Top    #5
    polyvue's Avatar
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    Re: Possible Chemistry issue.

    Here are the Recommend Levels for a plaster pool using a salt water chlorine generator:

    FC 3-5
    pH 7.5-7.8
    TA 60-80
    CH 250-350
    CYA 70-80

    If the test results provide by LPS are correct, they would indicate that the water is not too far out of line. Unfortunately, you can't always depend on pool store test results; their methods of testing and precision greatly vary. In any event, there is nothing here that would to me be indicative of a problem that might produce the white flakes you've noticed accumulating in the spa.

    Is the water otherwise clear? If the Combined Chlorine (CC) is actually 1.0 ppm (TC - FC = CC) you may want to consider adding liquid chlorine in order to shock... of course, this may or may not have an effect on the white flakes.
    14,555 gal in-ground 16'x29' white plaster Pool w/spa (2007); Goldline Aqua Logic AQL-PS-8 control w/Aqua Cell 15 Salt Water Chlorination (SWCG); Hayward TriStar 1HP (1.85 SF) main / 1.5HP (1.60 SF) spa pumps; Hayward Swimclear cart filter C4025, ColorLogic LED lights; Tankless SP-18-4 electric heater; Polaris 280 cleaner.
    __
    View of spiral galaxy in Ursa Major NGC6217 - Hubble Telescope 2009

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