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Thread: Algae or not?

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    Algae or not?

    Today I noticed a darker discoloring along the bottom of my pool where the botton ond side seam together on a slight angle (those familiar with vinyl liner pools know where I'm talking about). Otherwise, water is clear and clean. My first thought was algae. Being new to pool ownership I thought I would throw it out. Anyone have any thoughts on if this is likely algae or not? Can algae be present like this in an otherwise extremely clean looking pool? I brushed it off and jacked up the bleach slightly higher than normal (but not near shock level). Should this be sufficient treatment (assuming it is algae)?

    Thanks,
    Rob
    25K gal vinyl inground, 1HP Hayward Pump, Hayward DE 4820 Filter

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    Mod Squad woodyp's Avatar
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    Re: Algae or not?

    An overnite FC loss test will tell if it was sufficient or not.
    1ppm loss or less equals good to go.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    dmanb2b's Avatar
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    Re: Algae or not?

    Please post a full set of test results and as woody mentioned, you can confirm with an overnight FC loss test. If you loose 1ppm or more overnight, you should shock.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

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    Join Date
    May 2010
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    Lehigh Valley, Pennsylvania
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    Re: Algae or not?

    I did an overnight FC test last Thursday/Friday with no loss. Didn't take a test yet today, but results have been:

    FC-target of 5 but usually dropped to 2 within a day when I was replenishing bleach
    CC-0
    TA-120
    pH-8.0
    CYA-40
    CH-65
    25K gal vinyl inground, 1HP Hayward Pump, Hayward DE 4820 Filter

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    Mod Squad woodyp's Avatar
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    Re: Algae or not?

    that's a normal FC loss with sun and swimmers.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    frustratedpoolmom's Avatar
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    Re: Algae or not?

    your PH is too high (unrelated to your question, I know)
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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