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Thread: New Pebble Finish - Algae Problems.....

  1. Back To Top    #1

    Join Date
    Aug 2016
    Houston, Texas

    New Pebble Finish - Algae Problems.....

    Information about my pool:
    DE Filter
    24,000 gallon pool
    Just had a new dark blue pebble finish (dark blue quartz and black glass finish) installed 2 months ago.

    Chemical Balances:
    PH – 7.8
    FC – 4
    TC – 5
    Total Alkalinity – 100 ppm
    Calcium Hardness – 270 ppm
    CYA – 50

    Recently cleaned my filter and added new DE powder. Water temperature about 90 degrees (Houston – summer time)……
    It appears to have good circulation and balances remain within the normal requirements but every week I’m seeing more green algae growth on the sides of the pool…..
    We have had some serious rain in the past month.
    Does anyone have any suggestions as to why I’d be seeing algae growth with the numbers above? I didn’t have this problem with a plaster finish. Would adding algaecide help or is there something else I’m missing?

  2. Back To Top    #2

    Join Date
    Jun 2016
    Austin, TX

    Re: New Pebble Finish - Algae Problems.....

    What kind of test kit are you testing with?
    13k Gallon IG Pebble w/ attached Spa, AquaRite T-Cell-15 SWG, Hayward DE6020 Filter, Hayward 2 HP Pump, Hayward 400k Heater, TF-100 Kit, Pool Logger

  3. Back To Top    #3

    Join Date
    Aug 2016
    Houston, Texas

    Re: New Pebble Finish - Algae Problems.....

    It was purchased at Leslie's Pools. It's a Taylor test kit that tests:
    Free Chlorine
    Total Chlorine
    Acid Demand
    Base Demand
    Total Alkalinity
    Calcium Hardness
    It was recommended by a pool company who did the startup on the pool when the pebble finish was complete.

  4. Back To Top    #4
    MarianParoo's Avatar
    Join Date
    Aug 2014
    Northern IL

    Re: New Pebble Finish - Algae Problems.....

    You need to upgrade your testkit a tad with the FAS-DPD chlorine test. It's the Taylor K-1515C. It will allow you to test FC at much higher and more accurate levels.

    If you are seeing visible algae, you NEED that ability.... And you need to slam. See this:

    Pool School - SLAM - Shock Level And Maintain
    Last edited by MarianParoo; 08-29-2016 at 11:05 PM. Reason: Link didn't show the first time.
    27K IG rectangular; vinyl liner; sand filter; 1hp pump; auto-cover; heater; K-2006.

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