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Thread: Algae in Pebble Pool Question

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    Join Date
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    Algae in Pebble Pool Question

    Our pool has Wet Edge Satin Matrix in the Northshore Carribbean color. The pebble contains a moderate amount of black pebbles as well as tan and blue. I have seen smooth white plaster pools with algae before, but never a pebble pool. Isn't if very difficult to see the algae with so many pebble colors? I am concerned as my FC fell to around 1.5 today when I tested and then after running the Polaris 9300 robot I had streaks on the walls where you could easily see where he had scrubbed. Looked like the plaster was brighter blue where the robot had cleaned. I then went around the pool with the nylon brush and brushed the sides. However, even by brushing very hard I could not make the plaster bright like the robot did (in the dull areas). I have heard that the walls may feel slimy if algae is present. The walls are not slimy feeling at all. Also the CC is 0. If algae were present wouldn't you expect to see CC higher than 0?

    I just want to know exactly what to look for just in case the culprit was to appear now or in the future.

    On another topic my robot still pulls out small pebbles when cleaning. Not near as many as in the first couple of months after pool build. The pool was finished & opened in August of last year, (9 months old). Is this normal?? I emptied about 1/2 teaspoon of pebbles out of the robot filter today. CH = 270
    Thanks
    20,500 gallon free form, 6X9 hot tub w/ spillover, 18" jumping platform w/ 3ft shear descent on chopped rock, Travertine coping, 2.5HP Hayward 2-speed filter pump, 525 Hayward Cartridge filter, 350K BTU Hayward NG Heater, 2HP Hayward water feature pump, Satin Matrix Northshore Carribbean, Jandy PDS-8 Controls

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    duraleigh's Avatar
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    Re: Algae in Pebble Pool Question

    I just want to know exactly what to look for just in case the culprit was to appear now or in the future.
    A prime principle of BBB is accurate testing. Testing for FC will reveal the potential for algae long before you can see it. If your tests results are kept within the guidelines established, the chances of you having algae are remote.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    JasonLion's Avatar
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    Re: Algae in Pebble Pool Question

    Getting some extra pebbles coming off your first spring is normal. If they continue to come off at that rate there might be some problem.

    CC is often zero throughout an algae bloom, though it can also be above zero.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Algae in Pebble Pool Question

    Thanks Jason!! I do intend on doing proper testing and keeping the levels where required. However, we do get some monster rains from time to time in SE Texas & if I'm away for the weekend when this occurs the FC can disapate rather quickly. Just wanted to know how people often figured out a small algae problem may be brewing after a short stent with low FC.
    20,500 gallon free form, 6X9 hot tub w/ spillover, 18" jumping platform w/ 3ft shear descent on chopped rock, Travertine coping, 2.5HP Hayward 2-speed filter pump, 525 Hayward Cartridge filter, 350K BTU Hayward NG Heater, 2HP Hayward water feature pump, Satin Matrix Northshore Carribbean, Jandy PDS-8 Controls

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    Mod Squad Bama Rambler's Avatar
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    Re: Algae in Pebble Pool Question

    The easiest way to tell if you have something going on is if you notice an increase in daily FC loss over a couple of days. If you manually chlorinate the pool this is easy because you'll notice the FC is lower than normal when testing and t takes a greater amout of chlorine to bring it back to normal. If using a swcg you'll notice it because you'll have to increase the runtime or output of the unit to maintain the same FC.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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