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Thread: The dangers of cyanobacteria

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    Water_man's Avatar
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    The dangers of cyanobacteria

    From the Boston Globe. I don't know if this also applies to pools, but since swimmers like to swim everywhere, chances are you may dip in a contaminated pond. FYI and be careful.
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    polyvue's Avatar
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    Re: The dangers of cyanobacteria

    One would hope that whatever cyanobacteria happen to fall in or develop in pool water would be sanitized/oxidized by appropriate levels of hypochlorous acid. Eeewh.
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    Mod Squad JohnT's Avatar
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    Re: The dangers of cyanobacteria

    To clarify, the article says that cyanobacteria is often misnamed blue-green algae. Cyanobacteria IS blue-green algae, the stuff that grows in our pools if the chlorine gets too low.
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    Re: The dangers of cyanobacteria

    Really? I recall cyanobacteria from fish tanks as a sticky, filmy sheet of blue-green that stinks. Very different from ordinary green algae.
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    Re: The dangers of cyanobacteria

    Cyanobacteria is also known as blue-green algae though it is technically a bacteria and not a plant. Because it uses photosynthesis it acts somewhat like algae. Some forms can do nitrogen fixation so can use nitrogen gas as a nutrient (instead of nitrates).

    Green algae is different and is a plant, not bacteria. It is green algae that is the most common kind found in pools.

    Sufficient chlorine relative to Cyanuric Acid (CYA) will prevent the growth of either.
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    Mod Squad JohnT's Avatar
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    Re: The dangers of cyanobacteria

    Quote Originally Posted by anonapersona
    Really? I recall cyanobacteria from fish tanks as a sticky, filmy sheet of blue-green that stinks. Very different from ordinary green algae.
    The film on top with a blue-green algae bloom is composed of the dead cyanobacteria. Yes it is different from green algae, which is a true algae. "Black algae" is a form of cyanobacteria, and the cyanobacteria that are known as blue-green algae are found in the soil and air virtually everywhere. I believe that the BG algae prefers the water to be stagnant, which may explain why green algae is more common in pools that haven't been abandoned or neglected completely.
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