Diatom (brown) algae in a mature tank??

Discussion in 'Algae' started by Mr Bee, 26 Aug 2008.

  1. Mr Bee

    Mr Bee Member

    Joined:
    14 Aug 2008
    Messages:
    62
    Location:
    Wakefield, West Yorkshire
    Hi all,

    I've been doing a bit of reading since finding this forum, and it seems that most sources say brown, diatom algae should only be present in newly set up (uncycled) tanks, and last a few weeks.

    But I still get brown algae in my tank, despite it being fully matured - why's this??

    My water stats are pretty normal I think:-

    Ammonia - Zero
    (NO2) Nitrite - Zero
    (NO3) Nitrate - ~10 ppm
    pH - 7 - 8
     
  2. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

    Joined:
    11 Jul 2007
    Messages:
    8,953
    Location:
    Chicago, USA
    Hi,
    Diatom algae can persist if the lighting remains too high or if insufficient water changes are performed. Also, are you dosing nutrients? Insufficient dosing could lead to problems.

    Cheers,
     
  3. Mr Bee

    Mr Bee Member

    Joined:
    14 Aug 2008
    Messages:
    62
    Location:
    Wakefield, West Yorkshire
    Hi,

    Well its not from too much lighting, as I don't actually have any lights in my tank, the built in one broke and I never replaced it, as they seem to do fine without it.

    I do a regular 20 - 30% weekly water change, but am not dosing any ferts or anything, could that be it?
     
  4. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

    Joined:
    11 Jul 2007
    Messages:
    8,953
    Location:
    Chicago, USA
    Um...Yes, that could easily be it. Dosing requirement depends on the nutrient content of your source water as well as the lighting level. But even at lower lighting levels plant nutrient uptake is still a necessity although at a lower rate.

    Cheers,
     

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