Please ID algae

Discussion in 'Nuisance Algae' started by gaboon, 3 Jan 2009.

  1. gaboon

    gaboon

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    I'm sure this is hair algae but just want to make sure.
    [​IMG]

    This is the one that worries me. Can you also ID the lime green one.
    [​IMG]

    Nitrates are undetectable and phosphates are 0.01.
    I also have a huge amount of chaeto in the sump.
     
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  3. viper357

    viper357 Admin MASA Contributor

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    The 2nd pic is a mixture of Halimeda (bright green) and bryopsis.

    Halimeda is ok, although it does consume calcium.

    Bryopsis is a nightmare worse than hair algae and can take over your tank. You need to deal with that asap.
     
  4. Mike

    Mike Retired Moderator

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  5. gaboon

    gaboon Thread Starter

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    Cool thanks, its the only patch in the tank so need to act now. I started a thread a few days ago about just hooking up my calcium reactor, is it ok to dose Kents KH builder at the same time? My KH has remained at 7. Will check magnesium levels now.
     
  6. jacquesb

    jacquesb Retired Moderator

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    Gaboon - here are 2 things that I found that works to remove the bryopsis algae (I struggled with it for a very long time):
    - slowly increase your magnesium levels to eg 1500 - then keep it there for at least a few weeks
    - slowly increase your alkalinity to 14dKh - then keep it there for the same number of weeks as the above
    This should kill off the bryopsis by overloading it with magnesium, which accellerates the algae's metabolism, meaning that "it basically burns itself out".....
     
  7. gaboon

    gaboon Thread Starter

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    Thanks jacquesb, can I add the KH builder while the calcium reactor is running?
     
  8. Reef Maniac

    Reef Maniac MASA Contributor

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    Yes, BUT you must obviously test your alkalinity/hardness and make sure that you do not go to high.

    By the way: Halimeda only grows in tanks with excellent water quality, so that's saying something about your tank :thumbup:

    Hennie
     
  9. gaboon

    gaboon Thread Starter

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    Thanks RM!
     
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