Yellow Hemianthus cuba + spots on staurogyne

Discussion in 'Plant Help' started by Silas Felipe, 1 Mar 2015.

  1. Silas Felipe

    Silas Felipe Newly Registered

    Joined:
    1 Mar 2015
    Messages:
    1
    Hi everybody

    My Hemianthus cuba is getting yellow. After seeing the symptoms on the internet, I realized that may be lacking in nitrogen. I started last week a treatment (Seachem nitrogen) and the leaves are still yellow. I realized also that my staurogynes are with black and transparent spots on their leaves. Could someone tell me if it really shortage of nitrogen? And these holes in staurogyna, which can be?

    My setup:
    Size: 60x30x30 - 20Gallons
    Lighting: 4x24W - T5 JBL
    Substrate: ADA Amazonia + ADA Power Sand
    Fertilizer: Brighty Step 1 - 3x times per week + diary brighty K
    PWC: each 3 days (40%)
    Temperature: 28 ° C (82 fahrenheit)
    PH: 6.8
    KH: 6
    GH: 5
    Amonnia: 0 ppm


    Sorry , about my english. I am Brazilian.

    Obrigado!

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  2. Martin in China

    Martin in China Forum Moderator Staff Member

    Joined:
    28 May 2013
    Messages:
    2,333
    CO2 doesn't reach the substrate and doesn't seem to get dissolved enough, try to aim the filter output directly at the diffuser or the diffuser more into the flow of the output, this might help.
     
  3. alto

    alto Member

    Joined:
    24 Dec 2014
    Messages:
    4,603
    You might also reduce the lighting,
    how long are lights on?
    when is CO2 on?

    You might also reduce the temp if possible as this would increase dissolved gasses (C02 & oxygen).
     
  4. Martin in China

    Martin in China Forum Moderator Staff Member

    Joined:
    28 May 2013
    Messages:
    2,333
    Totally agree...lower light input and lower temp. (I have my tanks at 24-25 C)
     
  5. Henry

    Henry Member

    Joined:
    20 Mar 2013
    Messages:
    901
    Location:
    Salford
    As mentioned above: textbook CO2 deficiency. Just by looking at the pics, most of the CO2 bubbles are reaching the surface. Consider installing a spraybar along the back of the tank for maximum distribution.

    What filter are you using?
     

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