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Thread: My algae scrubber - weird circles on the net

  1. #1

    Join Date
    May 2011
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    4

    My algae scrubber - weird circles on the net

    Hello Everyone

    My scrubber has been running for over two weeks now. I have 40W CFL 2700CFL bulbs on both sides. First week I scraped off about a handfull of very dark almost black algae. The second week which was yesterday i got pretty much the same amount and the same stuff. Only thing I noticed is that before cleaning on my 2nd week these weird circles started appearing on the scrubber net and they seemed to be getting bigger. What is that ?? Also, is this type of very dark green almost black algae normal? Please see pics below.. Thanks
    Attached Images Attached Images

  2. #2

    Join Date
    Sep 2010
    Location
    egypt
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    160

    Re: My algae scrubber - weird circles on the net

    very dark algae means high nutrients it will gets greener as the nutrients come down

    for those circle i think santa may have answer

    what is ur parameters any way?

  3. #3
    Administrator
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    Oct 2008
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    Salt Lake City, Utah, USA
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    Re: My algae scrubber - weird circles on the net

    Circles are pods, eating the algae faster than it is growing. There are alway pods, but they are usually covered up by new growth, so you don't see them. Since your growth is flat like paper, you see them.

    Black growth needs cleaning every 3 days until it turns brown. Stronger lights will speed up the process.

  4. #4

    Join Date
    May 2011
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    4

    Re: My algae scrubber - weird circles on the net

    Thanks for the replys.
    Yeah, I thought they might be pods but I was looking for them and could not see them. My parameters are:
    Tank size is 90 gal.
    Temp 78F
    pH: 8.36 during the day 8.20 during night +- 10%
    dKH: 6.06 or 2.36 meg /L
    Calcium: 450 Magnesium 1330
    Ammonia - 0, Nitrite - 0, Nitrate - 3,Phosphate - 0.13

  5. #5
    Administrator
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    Oct 2008
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    Re: My algae scrubber - weird circles on the net

    They are baby copepods, less than 7 days old, so you can only see them with a microscope.

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