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Thread: Help with Green water

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    Join Date
    Jun 2013
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    Help with Green water

    I'm not sure what's going on here. Can you visually tell if the cause is algae? I don't see anything on the pool liner that looks like it, it seems like the water is just green. Here's what I have done to this point:

    1. Filled pool
    2. Added salt
    3. I remember for a day or 2 it did seem green but it eventually cleared up with nothing but salt in the water
    3. Realized salt test strips were wrong and purchased taylor salt test kit
    4. Salt test says I have 2x too much salt
    5. Remove 1/2 water
    6. Fill, circulate and re-test
    7. Salt level is good now so I finally turned on my SWG
    8. Water turned green, I think it was the day after filling
    9. I used the SWG to shock yesterday with no changes today
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    Mod Squad JohnT's Avatar
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    Re: Help with Green water

    What are your chlorine and CYA levels?

    Any metals in your fill water? Sometimes the yellow from iron combined with the blue liner can make the water look green.
    TFP Moderator
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    Re: Help with Green water

    I just tested and got this:

    FC=13.5
    CC=.5
    CYA=70

    Do I have to take a sample to a pool store to check for metal? What I don't get is why it cleared up the first time but not the 2nd.. frustrating.. my kids want to swim in it!
    --- Pool Status - Ice Cube
    18'x9'x52" Intex Rectangular Pool with Krystal Clear 2560gpm Sand Pump and Krystal Clear Salt Water System
    Hayward Skimmer with (2) 1 1/2" Hayward Returns
    16mil Klear Choice Solar Blanket

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    Mod Squad JohnT's Avatar
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    Re: Help with Green water

    I would let my kids swim in it as is. It might not hurt to rinse their suits in tap water when they get out.

    Is your chlorine level fairly stable?

    What is your water source? A pool store can test for metal, but you may have to look for one that does and tell them you want to test for metals. If they recommend a sequestrant, go with one as recommended in pool-school/metal%20stains
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  5. Back To Top    #5

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    Minnesota
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    Re: Help with Green water

    I've only had chlorine for about 5 days now so its hard to say but it seems pretty stable.

    Water is city water. We did have a bunch of rain a few days ago though too.
    --- Pool Status - Ice Cube
    18'x9'x52" Intex Rectangular Pool with Krystal Clear 2560gpm Sand Pump and Krystal Clear Salt Water System
    Hayward Skimmer with (2) 1 1/2" Hayward Returns
    16mil Klear Choice Solar Blanket

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    Mod Squad jblizzle's Avatar
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    Re: Help with Green water

    Looks like metal to me as well:
    pool-school/metal%20stains
    Jason, TFP Moderator
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