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Thread: Water Going Green

  1. #1

    Join Date
    May 2009
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    Water Going Green

    Hi all any one can help plz
    NO3 0
    PO4 0
    Ammoina 0
    the last test i clean my screen every 5 days
    but my water is geern in colour do i do a water change to clear it up ?
    are raise my temp to the tank to 27c as i run it at 25c any help would be good :P

  2. #2
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    Re: Water Going Green

    Green water is caused by:

    Not removing the screen before cleaning.
    Not washing the screen in FW before putting it back.
    Having too much algae growth in your sump that you manually remove.

    In all three cases, pieces of algae break apart, and the green stuff goes into the water. So solve this by:

    Removing the screen and taking it to the sink for cleaning.
    When removing it, don't break or remove any algae.
    After cleaning it in the sink, run lots of FW over it.
    In your sump, make sure the scrubber lights point only at the screen. If they light up the sump too, algae will grow there and break off.

    After you correct the problem, the green water will go away by itself in a few days as it gets eaten by copepods.

  3. #3

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    Re: Water Going Green

    I will try what you say to see if thats what is doing it but i all ways clean the screen in the sink

  4. #4
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    Re: Water Going Green

    Then look for any areas in the sump where algae is growing and breaking off.

  5. #5

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    Re: Water Going Green

    Just looked there is no algae in the sump

  6. #6

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    Re: Water Going Green

    It was happening to me(pea green water) but I just changed from one type of light to another and the tank

    was fairly new. The algae was transitioning from one type to another. Could your lights be getting weak?

    It is hard to tell with your eyes that a light is getting weak and possibly changing its spectrum output.

    Hope this helps.

  7. #7

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    Re: Water Going Green

    i though that as well just put 2 new 15k had 20k 250watt its more green now
    could it be the water is not turning over or i need more power heads in the tank i have 2 vortech mp40w
    do i need more ?

  8. #8
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    Re: Water Going Green

    Are you washing all the algae off the screen so there is nothing left to flow into the tank?

    One test is to clean the screens completely, using a brush, all the way down to the plastic, and even in-between the screens. Then, there will be nothing left to let go.

  9. #9

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    Re: Water Going Green

    Ok i didnt clean between the screens thought you just clean the out sides
    thanks for telling me will start doing that
    Do i have to cable tie them back?

  10. #10
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    Re: Water Going Green

    Don't take them apart; just get the brush down in the holes. It's just a test.

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