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Thread: Mustard Algae?

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    Propbndr's Avatar
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    Mustard Algae?

    I have a recurring mustard / light olive drab colored growth on my skimmer socks. It starts showing up about 24 hours after sock installation. Soaking in strong bleach solution "destroys" it. No growth or buildup is on the pool surface, just "normal" dirt which is easily vacuumed out. The water is crystal clear and the pool surface feels clean when rubbed with hands or feet. During daylight hours, the entire pool is sunlit, the only thing that is in the shade is the interior of the skimmers.

    Test numbers
    FC 9.5
    CC 0
    PH 7.5
    CYA 80
    TA 80
    CA 175
    Salt 3800 (as reported by the swg)

    I SLAM'd the pool about 6 weeks ago because of a slimy feel to the surface. As mentioned above, no more slimy feel anywhere.

    Could I have a mustard algae issue?
    Steve
    32 X 16 inground, 17260 gallons, Vinyl Liner, Triton II TR-60 filter,
    Sta-Rite 1hp pump Model #MPRA6E-147L, CircuPool SI-30 Plus SWG, TF-100 Test Kit

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    duraleigh's Avatar
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    Re: Mustard Algae?

    It is possible but not likely. Mustard will grow along the walls and floor of a pool........never had a report of it growing in a skimmer before.

    I suspect you have a thin layer of pollen on your pool that is only seen when it's concentrated in the skimmer sock.

    If it persists for a few days, you could do an OCLT to confirm there are organics (algae) in your pool.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Propbndr's Avatar
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    Re: Mustard Algae?

    OCLT results shows FC dropped by .5 in 12 hours. CC is 0.

    I did find my pool is collecting frogs, a skink, and what looked like a salamander. I can understand the frogs and skink but, where the heck did the salamander come from? There is no other water source within several hundred yards from my property.

    With all the rain we have had over the last several days, it's time to drain about 6" of water. My skimmers are starting to look like submarines.
    Steve
    32 X 16 inground, 17260 gallons, Vinyl Liner, Triton II TR-60 filter,
    Sta-Rite 1hp pump Model #MPRA6E-147L, CircuPool SI-30 Plus SWG, TF-100 Test Kit

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    Texas Splash's Avatar
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    Re: Mustard Algae?

    Your pool has become a wildlife sanctuary.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    DaninFLA's Avatar
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    Re: Mustard Algae?

    is it a gecko? I agree, sounds like pollen
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

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    Propbndr's Avatar
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    Re: Mustard Algae?

    Quote Originally Posted by DaninFLA View Post
    is it a gecko? I agree, sounds like pollen
    Yup, a gecko. We call em Skinks up here.
    Steve
    32 X 16 inground, 17260 gallons, Vinyl Liner, Triton II TR-60 filter,
    Sta-Rite 1hp pump Model #MPRA6E-147L, CircuPool SI-30 Plus SWG, TF-100 Test Kit

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