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Thread: green water from organics or well water?

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    green water from organics or well water?

    Good Morning!
    I have a 22 foot round above ground pool with a 4600 gph sand filter. This is our second season with the pool. Last summer was perfect and trouble free. We covered our pool with a winter cover that let water through but kept leaves and yuck out. About 3 weeks ago i decided it was warm enough to open the pool. In an effort to shorten the story, I dumped all the stuff on top of the cover into the pool. Lesson learned. So, after raking and sweeping and filtering and chlorinating, we finally got everything out from the cover. Now our pool is full, and transparent with a green tint. I can't get the green to go away. I am not sure if it is algae or green from metals in the well water that we used to fill. Is there an easy way to tell and do I need to drain my pool and have water trucked in? My readings are:
    FC 10
    Ph 7.2
    Alakinity 120
    hardness 200
    CYA 0 we haven't added stabilizer yet.

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    Smykowski's Avatar
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    Re: green water from organics or well water?

    Clear green usually means metals. You can verify with a pool store test. While we don't trust their chemical readings, their tests for metals are good enough to give you an idea what's going on.

    Ideally, yes you'd need to truck in water (or better yet, hope for rain). I don't know the details, but there are sequestrants you can use to fight metals until the water is replaced. Someone else will have to chime in with instructions for that.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Richard320's Avatar
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    Re: green water from organics or well water?

    Welcome!

    Two things consume chlorine: sunlight, and organics - algae. If you do an overnight loss test and don't lose chlorine, you know it isn't algae. And if there's no algae, it must be metals. A metal sequestrant will probably be cheaper than a truckload of water. http://www.troublefreepool.com/conte...d-metal-stains
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: green water from organics or well water?

    Thank you for the advice. Do I need to just use the metal sequesterant or do I need to do an ascorbic acid treatment with it? I don't have any stains on my liner, just the dumb green water.

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    Richard320's Avatar
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    Re: green water from organics or well water?

    Quote Originally Posted by adaenell View Post
    Thank you for the advice. Do I need to just use the metal sequesterant or do I need to do an ascorbic acid treatment with it? I don't have any stains on my liner, just the dumb green water.
    No stains, no worries. You will have if you don't deal with it quick, though.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: green water from organics or well water?

    Ok so since I'm a teacher and a skeptic, please help.
    True or False:
    The pool store confirmed metals in the water but said that since we chlorinated the pool already, the chlorine plated the metals and now they have solidified making metal sequesterents ineffective. They told us to raise pH and alkalinity and backwash the filter like crazy and in two or three days it will clear up........

    Like I said, T/F? Second opinions please?

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    Re: green water from organics or well water?

    Ignore the pool store and stick with TFP methods. Your TA is already high and your PH is fine where it is right now. Only backwash when your guage rises 15-20% above clean psi or you have low water flow coming from the return.
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    Re: green water from organics or well water?

    So AZgirl71, it will clear up eventually on its own?

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    Re: green water from organics or well water?

    I can't see in this thread where you confirmed it was metal. Is your water murky green or clear green. Do you have a pic?

    Sorry! I see now that it is metal.

    You have precipitated SOME of the iron out of your water but probably not all. It will likely clear up on it's own but, assuming you have iron content in your fill water it will simply reappear from time to time.

    The solutions are to stop using iron laden fill water or start using a sequestrant.

    I would give it at least another 48 hours and see if it clears. If not, use the sequestrant. Repeating, though, you will have to use the sequestrant for the life of the pool as long as you have iron in your fill water.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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