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Plant Necrosis

Discussion in 'Advanced Strategies and Fertilization' started by kizwan, Apr 10, 2021.

  1. kizwan

    kizwan Member

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    Hello,

    I need help in determining what could be causing the plants to deteriorated. The plant is Ludwigia sp. 'Dark Orange'. The leaves damaged. I have increased water change but it does not improve. I also have stopped ferts but it only makes things worse. I also have tried increased dosing but that doesn't work as well. For each try (stop / increase dosing), I tried almost a month. IMG_20210411_114419.jpg IMG_20210411_114511.jpg IMG_20210411_114643.jpg
     
  2. Mooner

    Mooner Lifetime Charter Member
    Lifetime Member

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  3. kizwan

    kizwan Member

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    I have corrected the problem. I found an old thread which have similar problem with mine. In that thread Tom Barr advised the thread starter to do deep vacuum of the soil. The thread starter have same main issue with mine where plants failed to developed heathy root. Basically, if I understand correctly there's too many organic matter that causing anaerobic condition in the soil. So the organic carbon is eaten up by bacteria under very reducing conditions (no O2). Without new source of O2, it only getting worst. I did open a thread here before asking whether I can use H2O2 to help oxygenated the soil. On the bright side, I learned Bacopa Caroliniana love ammonia as nitrogen source while Ludwigia sp. 'Dark Orange' prefer nitrate. Other than failed to root, Bacopa Caroliniana are healthy. Can not say the same thing with Ludwigia which the leaves develop necrosis & eventually died when I stop ferts.

    Right now, after cleaning the soil more than a week ago, the plants are now growing well.

    Just a summary; the tank was fully rescape without removing the soil. So the old soil, mixed with organic matter after over one year using it, unfortunately causing anaerobic conditions because there's no healthy root to oxygenated the soil. The bacteria that eats organic carbon require oxygen. So it only progressively getting worst.
     
    #3 kizwan, Apr 25, 2021
    Last edited: Apr 26, 2021
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