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View Poll Results: To Phos Free or Not?

3. You may not vote on this poll
  • Phos-Free is a scam.

    2 66.67%
  • Phos-Free has worked in my pool.

    0 0%
  • Phos-Free is useful for hands-off pool owners.

    0 0%
  • Phos-Free is a waste if chem levels are in check.

    1 33.33%
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Thread: Green Algae? at Waterline

  1. Back To Top    #1

    Join Date
    Mar 2010
    Tustin, CA (Orange County)

    Green Algae? at Waterline


    Water chem is right on and there are no issues with algae in the actual pool; however, there is a bright green something growing on the grout right above the waterline. Not sure if algae or moss/mold/fungus.

    The 2008 post below mentioned brushing a 50/50 clorox solution on the problem areas:


    Is this still an accurate process to remove the problem? Saw "Green Out" mentioned somewhere but not sure if it is used for the same situation or if that product works.

    Also, I searched "phos-free" and came up with a couple opinions on it. Just wanted to throw it out there again and get a really good handle on TFP member's thoughts cuz it's something Leslies is pushing hard core and we have been adding to the pool like faithful lemmings. Not sure if it makes a difference for dark bottom pool owners.

    Tustin, CA (Orange County)
    Curacao Quartz Finish (grey plaster with grey, black, blue & white quartz)
    29k gallon IG
    Pentair WhisperFlo Pump
    Pentair FNS Filter
    Hayward SwimPure T15 SWG

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Green Algae? at Waterline

    I would simply put clorox in a spray bottle and spray it directly on the grout. It should clear up rather quickly although there may be a slight staining left behind. Brushing with a deck brush and maybe even just a little soap would be helpful in clearing up any residual stains.

    Skip the phos-free. You are wasting your money.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Green Algae? at Waterline

    Phos Free is nearly always a waste of money. If you maintain your FC levels appropriately there is no need for Phos Free.
    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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