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Thread: Is this tree pollen or algae? Or something else entirely?

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    Question Is this tree pollen or algae? Or something else entirely?

    Hi all, long time lurker, first time poster.

    Here's my question: This weekend, I meticulously vacuumed my 25,000 gallon pool because there was a build-up of what looked like sand or silt in the bottom. It's greenish-tan in color, and very fine. It collects in batches, almost always in low spots in my vinyl lining (seems, low spots, etc.).

    After admiring my handiwork, I went to work the next day, but when I returned home, the same stuff was back, almost in the same spots... so... thinking maybe I stirred some of it up and didn't get it all, I started the vacuum process all over again, this time being extremely careful not to stir the water. It took me the better part of an hour, but once again, the bottom of my pool looked fantastic.

    Fast forward to the next day, and BAM. The same stuff is down there.

    Yes, I vacuumed with the pump set to "filter" and not to "waste." Is that where I'm going wrong? Is this stuff just passing completely through my sand filter and blowing back into the pool? OR, is this stuff actually freshly fallen particulates from the towering trees I have in my backyard. Pics attached. Let me know what's going on if anyone has any ideas...

    Here's a few photos. First one showing a small leaf on the surface for scale. Note the vinyl seem is filled with the silt and overflowing:

    IMG_4978.jpg

    Another angle:
    IMG_4979.jpg

    Opposite corner of pool, same stuff:
    IMG_4980.jpg

    And finally, a shot of the corner above with the trees to show proximity.
    IMG_4982.jpg

    Let me know if anyone needs more info.

    Pool is 18x36 in ground pool with vinyl liner, sand filter. Recently shocked, etc.

    Thanks!

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    Mod Squad pooldv's Avatar
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    Re: Is this tree pollen or algae? Or something else entirely?

    Welcome to TFP!

    It seems like you are on the verge of an algae bloom and that is dead algae being killed every day. How about some test results and a little history of your chlorine levels recently.

    Here is what we are looking for, Pool School - Getting Started
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Mod Squad YippeeSkippy's Avatar
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    Re: Is this tree pollen or algae? Or something else entirely?

    Is it my monitor, or does that pool water look green? Is this the color it always looks?
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

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    Mod Squad pooldv's Avatar
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    Re: Is this tree pollen or algae? Or something else entirely?

    A good way to test to see if there is algae or organic matter consuming chlorine is yo raise FC to 10 and Pool School - Perform the Overnight FC Loss Test (OCLT)

    Yippy,
    Are you thinking clear green water might have copper?

    Dirtyname,
    Are you on a well? Any experience with copper issues in the past? Add algaecides with copper?
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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