Aquatic Plant Science

The science of submerged aquatic plants in the aquarium hobby


    Growth of plants and nutrient requirements

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    Lawrence So

    Posts : 21
    Join date : 2016-07-20
    Location : San Francisco, CA

    Growth of plants and nutrient requirements

    Post by Lawrence So on Mon Aug 01, 2016 9:34 pm

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    Rotala macrandra "Japan
    This is a new stem but it's already starting to grow deformed.  When I was growing it under the Barr ratio of 7:1 Fe:Mn of CSM+B, this plant lost all of its leaves, became completely covered in BBA, and died.

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    Ammannia pedicellata "golden"
    For some reason, this plant is very finicky
     It used to look like a crumpled, burnt matchstich. But once I stopped dosing traces, it started to sprout new leaves.  Now several months later, after dosing very low traces, this is what has grown.  Yes, that's more than 9 months of growth!  For some reason, it tends to crumple very easily, often correlated with dosing very low traces or water changes.

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    Rotala rotundifolias "green"
    For a plant that is supposed to be entirely green, the stem turned yellowish immediately after I tried Miller's Microplex at a concentration of 0.007ppm.  What caused this?  This has never happened in the many years I've kept it.  Also, what causes Rotalas to grow crumpled leaves? Is it a calcium deficiency or trace toxicity?

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    Anubias "petite"
    Interveinal chlorosis of somewhat newish leaves.  This started during the high iron, low traces dosing over a period of several months. Leaves are dull, not shiny.  I've tried adding extra zinc but no improvement.

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    Java fern "trident"
    The chlorosis has been persistent for several months. This started with high iron, low trace dosing.  The plant used to be almost completely stunted with deformed growth.  But with a more balanced Fe:Mn dosing, it started to grow.  I'm currently adding zinc to see if it can alleviate the chlorosis but no improvement.  I've read that calcium deficiency can result in the pale leaves so I'm going to add even more calcium (in the form of Ca acetate).

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    Limnophila aromatica
    The new leaves are redder after dosing ferrous gluconate.  The older leaves are white.  But for some reason, dosing iron (or traces) leads to GDA and GSA.  Also, under deficiency of Fe, Mn, or Zn results in smaller leaves.  I added a combination of the three which helped restore normal sizes leaves.

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