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Thread: new filled pool turned coffee brown after shock. iron?

  1. #1
    Senior Member
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    Sarnia, Ontario Canada
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    new filled pool turned coffee brown after shock. iron?

    well...lesson learned.

    i came home to find the pool guy had the liner in and was filling with my two hoses. i hooked up my sump pump, let it run for a few minutes and grabbed a glass and had a drink...(i know...not too swift). tasted fine to me and looked crystal clear, so i threw it in the pool and by my estimation, it probably filled 70% of the pool.

    i could see a slight greenish tinge to the newly filled pool... so i pulled out my test kit and did some reading. obviously, FC was 0, so fearing i was looking at an algea bloom beginning, i added enough bleach to raise the FC to 6ppm. an hour later, the water looked like steeped tea. i could not see the floor of the shallow end.

    i figured i was looking at the results of the clorine killing the algea...but doing some reading, it appears i more than likely have a high iron content. i filtered for half a day straight and cleaned the cartridges...they were very dirty but cleaned up reasonably well.

    i did some more reading and realized, that the best thing would be a complete dump and refill with just the city water. unfortunately, unless i get the pool builder to put the vacuum pump back on, i cant completely drain the pool (he said no less than 4" in the shallow end). so i am currently pumping it out.

    dang.

    so is this the best idea? it seemed the filter (420 sf pentair clean and clear cartridge) was removing the suspended iron...i just think it would take a long time to get it anywhere close to clear with the current amount of iron in it.

    guess i should see if the local health unit can test and tell me how much iron is in my well (sump pump) water...
    The big dig has begun! 20x47' double roman vinyl liner pool. Pentair EasyTouch 8PSC-IC40, Polaris 9300xi, Interfab Turbotwister slide, S.R. Smith T7 diving board with LED lit waterfall, 011018 Pentair IntelliFlo, Pentair Clean & Clear Plus Filter CCP420, Pentair 120V IntelliBrite LED, Cleardeck indeck solar reel, 530 sq' solar system vinyl-liner-pool-build-in-ontario-canada-new-pictures-t30213.html

  2. #2
    Senior Member frogabog's Avatar
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    Jul 2010
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    Re: new filled pool turned coffee brown after shock. iron?

    Might a shop vac work?
    Where kids swim in 54 degree water, turn blue, and giggle happily cuz they got a POOL!
    Year 3 BBB -15' x 48" Intex Metal Frame - Was using (2) 1000gph Intex cartridge filters (see Full time pumping Intex). 2012, converted to 1600gph and sand filter+SWG = Sand filter love affair!
    Don't waste time and energy looking for a better value on test kits, the TF100 is the best deal around. I did the looking and spent the extra money, but you don't have to make the same mistake. Just go here: TFTestkits. I use Pool Calculator for min/max, and shocking chlorine levels.

  3. #3
    Senior Member
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    May 2010
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    Sarnia, Ontario Canada
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    Re: new filled pool turned coffee brown after shock. iron?

    Ok, so I drained It down to 4" above the shallow end. I went into the pool and could see quite plainly mounds of precipitated iron.

    So if I keep the chlorine level high enough, will all the iron eventually precipitate out and allow for vacuuming/ filtering?
    The big dig has begun! 20x47' double roman vinyl liner pool. Pentair EasyTouch 8PSC-IC40, Polaris 9300xi, Interfab Turbotwister slide, S.R. Smith T7 diving board with LED lit waterfall, 011018 Pentair IntelliFlo, Pentair Clean & Clear Plus Filter CCP420, Pentair 120V IntelliBrite LED, Cleardeck indeck solar reel, 530 sq' solar system vinyl-liner-pool-build-in-ontario-canada-new-pictures-t30213.html

  4. #4
    Senior Member
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    Sarnia, Ontario Canada
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    Re: new filled pool turned coffee brown after shock. iron?

    i ended up keeping at shock levels for a few days. that kept the iron precipitated and the cartridge filter completely took care of it. phew!
    The big dig has begun! 20x47' double roman vinyl liner pool. Pentair EasyTouch 8PSC-IC40, Polaris 9300xi, Interfab Turbotwister slide, S.R. Smith T7 diving board with LED lit waterfall, 011018 Pentair IntelliFlo, Pentair Clean & Clear Plus Filter CCP420, Pentair 120V IntelliBrite LED, Cleardeck indeck solar reel, 530 sq' solar system vinyl-liner-pool-build-in-ontario-canada-new-pictures-t30213.html

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