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Thread: Black Algae Stains

  1. Back To Top    #1

    Black Algae Stains

    I have a friend who has a pebble tech pool that has significant black algae stains.

    We have tried water blasting them off (the pool is still full) but it is very tough. have also tried brushing but it is really not making a dent.

    Any ideas?
    16,000 Gallon IG SWG Plaster Pool
    Jandy Cartridge Filter
    Integrated hottub with gas heater
    Pump Size 1 hp
    Gilbert AZ

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Black Algae Stains

    Getting black algae completely killed is not at all easy. One approach that works for some people is to go up to mustard algae shock level and then pressure wash the pool surface (under water). Some care is required. You need to get the nozzle close enough to the surface to remove the algae, but not so close that it damages the surface.
    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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