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    BIGBOPPER's Avatar
    BIGBOPPER Posts: 351, Reputation: 28
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    #1

    Apr 30, 2009, 01:25 AM
    Algae on exterior concrete
    I answered a question on mold, and this one popped up in my head...
    I have a concrete porch, that has a major algae problem. I have tried bleach and scrubbing with a stiff broom, and that gets rid of some, but not all. I have tried a couple of commercial algae/concrete cleaners, and the algae went "Ha, ha, ha-ha! Is that all you have?"
    I want to clean the porch good this year, it is almost pool season, and I am about to put up my pool. What to do? Outside of dousing with gasoline and setting it on fire, that is.
    creahands's Avatar
    creahands Posts: 2,854, Reputation: 195
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    #2

    Apr 30, 2009, 05:31 AM

    Hi bigbopper

    Have u tried an algaecide and power washer.

    Have to put algaecide on and keep wet for about 1/2 hour. Then power wash off. May need more then one treatment.

    Hope this helps

    Good luck

    Chuck
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