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Thread: Now I'm confused...

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    dattia's Avatar
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    Jun 2008
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    West Chester, PA
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    Now I'm confused...

    I have been clearing my swamp for more than three weeks now. I have every confidence that this method works as I have brought my pool from black to sparkly last year using BBB and a LOT of guidance. I have been at a light, light green stage for about a week now and have been waiting patiently (or not) to turn the corner. I haven't had a CC reading of more than 0.5 for about a week. Yesterday, I replaced a non-working PSI gauge as I decided it was time to add some Fiber Clear to my sand filter. Just for curiosity's sake, I performed the Overnight Test even though the pool remains green, and I PASSED it. Could something else be going on or is it possible to pass an overnight test while the water remains green?

    9PM - FC 23, CC 0.5, TC 23.5
    530AM - FC 23, CC 0.5, TC 23.5


    TA - 130
    CYA - 50
    pH - 7.4
    27' round AG
    Hayward Matrix 1 1/2 HP Pump
    Hayward S210T Sand Filter

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    Join Date
    Mar 2010
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    Spring, TX
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    Re: Now I'm confused...

    From what I have read on the board, a sand filter takes the longest to clear an algae bloom pending how bad it was. I am sure the pros here will have more info for you.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
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    Butterfly's Avatar
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    May 2007
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    South Carolina
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    Re: Now I'm confused...

    Is it more clear green or cloudy green?

    What is your fill water? well or municipal?

    Ever tested for metals?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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  4. Back To Top    #4
    dattia's Avatar
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    Jun 2008
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    West Chester, PA
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    Re: Now I'm confused...

    It is a light milky green. It is municipal water and it has been in the pool for three years. I have never tested for metals, but I do know that we have some iron in the water around here. I do have some slight staining on the ladder rails that are under the water line, I took care of them last year at the beginning of the season and didn't have any problems after that. I intend to remove them and clean them again before we actually go swimming. This pool was a mess, it wasn't covered over the winter, is surrounded by trees that dumped at least a ton of their leaves in it... it is not an understatement to say it appeared black at the beginning of this process. I am pleased with my progress, albeit a little slow for my liking, just perplexed that I passed the Overnight Test.
    27' round AG
    Hayward Matrix 1 1/2 HP Pump
    Hayward S210T Sand Filter

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: Now I'm confused...

    That sounds like it is algae. The algae is all dead, or at least nearly all dead, at this point. The pool is still full of dead algae, and it just takes the filter some time to filter it all out. Make sure you run the pump 24/7. The water clarity should improve visibly each day. If it doesn't something is going wrong with your filter. It might be as simple as the filter needing to be backwashed, or there might be something more complex going on.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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