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Thread: Green water

  1. Back To Top    #1

    Join Date
    Jul 2013
    Location
    Fort Wayne, IN
    Posts
    2

    Green water

    Our pool water was starting to turn a little green so I tested the water and here were the results a couple of days ago:

    FC 0 - .5
    PH 7.8
    TA 240
    Copper 0
    CYA 0
    TH 100

    We added the following (per the pool calculator): 55 lbs salt, 60 ounces of stabilizer, 76 ounces of bleach and some PH minus.

    I tested the water again tonight and here are the readings:

    FC 0
    PH 7.5
    TA 80
    Copper 0
    CYA 0
    TH 200

    My husband vacuumed the pool and now it looks even more green than it did before! Any suggestions for what we should do now?????
    14,667 Gallon 26 x 52 Intex Above Ground Round Cartridge filter ~ filtering capacity of 2,500 per hour.
    Intex Krystal Clear Saltwater System (SWG)
    Purchased and installed in June 2013

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    In the Industry

    Donldson's Avatar
    Join Date
    Jun 2009
    Location
    NW Ohio
    Posts
    2,637

    Re: Green water

    Firstly: Welcome to TFP

    I think you may have misunderstood the pool calculator. Why did you need to add 55 lbs of salt? You have an SWG in your sig but you don't have any salt level mentioned.

    To help you we need to know: 1. Where you got those test results?, and 2. A bit more about your pool (use This as a guideline)

    After you get that information it would be a good idea to do some reading in the Pool School while you wait for a response. It will help you understand the answers we give you, and in the long run prevent future problems.
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

  3. Back To Top    #3

    Join Date
    Jul 2013
    Location
    Fort Wayne, IN
    Posts
    2

    Re: Green water

    Sorry for forgetting to put the salt level in the original post, it was 2930. I tested the water using test strips as the pool store was closed to take my water sample there. I added the additional pool information (at least what I could find) in my profile so I hope that helps.
    14,667 Gallon 26 x 52 Intex Above Ground Round Cartridge filter ~ filtering capacity of 2,500 per hour.
    Intex Krystal Clear Saltwater System (SWG)
    Purchased and installed in June 2013

  4. Back To Top    #4

    Join Date
    Aug 2013
    Location
    Oklahoma City, OK
    Posts
    125

    Re: Green water

    Time to SLAM!
    20000 Gallon, Sand Filter, IG Plaster, Hayward Aqua Rite 40k SWG, TF-100 Test Kit, Taylor SpeedStir

  5. Back To Top    #5

    Join Date
    May 2013
    Location
    Bay City, Michigan
    Posts
    283

    Re: Green water

    Is there a typo? it says you went from TA of 240 to 80

    In short, your water turned green because you didn't have enough chlorine. You didn't have enough chlorine because you had zero CYA. (CYA protects the chlorine from being consumed by the sunlight among other things) Without the protection from CYA your SWG could not make chlorine fast enough to keep it in the pool.

    First, pool store tests and test strips are not the best or most accurate method. The Taylor K-2006 or the TF-50 or TF-100 are the recommended ones with the tests you will need. For the price the TF-100 is a good deal since it has larger size reagents. Your gonna need those extra chlorine tests for a green pool. Those are recommned because they all have the FAS/DPD chlorine test. http://tftestkits.net/cart.html?m=splash

    Adding the stabilizer is exactly what you needed to do, it just doesn't show up in the test for up to a week or more. Use the Chlorine/CYA chart and treat your pool as your CYA level is what you aimed for.

    SLAM it. http://www.troublefreepool.com/pool-...king_your_pool


    Check out pool school as it is very useful and explains a lot. http://www.troublefreepool.com/pool-school/
    12500 gallons, 24 foot round above ground
    Hayward Sand filter, Pentair OptiFlo 1HP 2-Speed pump

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