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Thread: Algae bloom...again

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    Join Date
    Jul 2007

    Algae bloom...again

    My pool is 20,000 gallons, vinyl, no water features, Hayward super pump, sand filter. It is 88F.

    I used my Taylor K-2006 for the first time tonight. I love it I have been battling what I think is mustard algae, so I shocked it to what the pool calc recommended. If anyone would be inclined to offer advice, it is appreciated.

    CYA 32 ppm
    FC 4.4 ppm (shocked to 20)
    TA 100 ppm
    CC 0

    I am wondering how I can have algae and no CC. I also wonder why it is advised to keep TA at 100 when using Trichlor in a vinyl pool. I am using the pucks right now to add CYA. At what percentage of my CYA should I keep the FC level?

    I have been having the hardest time keeping algae at bay this year so I am doing something wrong. I have a good test kit now, and shocked according to the pool calculator, so I am on the right track. I even added 4 oz. of polyquat 60 a few days ago, but still I have an algae bloom.

    Thanks for any and all advice!
    20K IG vinyl, 1 HP Waterco Supastream pump, Hayward Pro sand filter, Compu Pool CPSC24 SWG
    Taylor K-2006 test kit

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Algae bloom...again

    Welcome to the forum
    and shocked according to the pool calculator
    You dosed the pool one time to attain shock level but you didn't shock the pool. Carefully read the article in Pool School on How To Shock your Pool and you will find it is a process that can last a few days rather than the one-time dose you applied.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Re: Algae bloom...again

    If CYA is too low youwill lose too much chlorine to the sun, leaving too little to keep the pool clean.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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