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Thread: Clear but with a green tint?

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    Clear but with a green tint?

    We opened our pool this spring after taking last year off, expecting to take some work and time to clear up our water. We are now at the point that our water is clear,but with a slight green tint. The pool store guy was just sure we had phosfates, I told him I thought it was metal I was right,we tested high for copper & added Metal Free. But still have a slight green tinge. We do have some staining, could that be causing our off color?

    Pool specs are: 18x 36. 40,000 gallons.
    Chemical reading: Th 200
    FC 3-5
    PH 7.2
    TA 80-120
    CYY 100
    We are trying to get our CYA down as we know that is high.

    Any feed back would be helpful. Thanks

  2. Back To Top    #2
    linen's Avatar
    Join Date
    Jul 2010
    Twin Cities, MN

    Re: Clear but with a green tint?

    Welcome to tfp, Deb6234

    You are right you cya is too high, we would recommend getting it down to 50 ppm....but is that result from a pool store? They tend to be very unreliable at testing cya. In addition, many tests show 100 even if the concentration is higher. See this link for appropriate test kits:

    If you water is tinted and clear, and you have staining it is likely metals as you suspected. The sequestrant you are using is not one that we recommend. See this pool school article:
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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