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Ludwigia mullertii curling leaves

Discussion in 'Are you new to aquatic plants? Start here' started by Pilaarbijter, Mar 13, 2012.

  1. Pilaarbijter

    Pilaarbijter New Member

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    Hello everyone,

    Since I've been starting a decent iron fertilizing program for my plants, my Ludwigia mullertii is starting to get really nice red colored leaves which, of course, i a great thing to see.
    However the new leaves that are growing are curling around the center vein of the leaf. Much like a clamp to visualize it.

    Got any ideas what the cause of this might be?

    Regards
    Ruben
     
  2. dutchy

    dutchy Plant Guru Team
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    So maybe the plant started to grow better. this also means it needs more CO2. Curling leaves (stunting) could be a consequence of a CO2 deficiency

    You can rule out ferts if you add enough. Light didn't change either? So what's left? CO2.
     
  3. Pilaarbijter

    Pilaarbijter New Member

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    Well I've been meaning to contact you about the fertilizing.

    As you know I've been working with osmosewater for about 4 weeks now.

    First weeks results:
    before water change: ph 7 / gh 9 / kh 6 / no3 15 / po4 2
    One day after water change: ph 7 / gh 9 / kh 7 / no3 10 / po 4 1.5

    Second week results:
    Before water change: ph 7 / gh 9 / kh 7 / no3 15 / po4 1
    One day after water change: ph 6.6 / gh 6 / kh 5 / no3 10 / po4 1

    Third week results:
    Before water change: ph 6.6 / gh 7 / kh 6 / no3 10 / po4 1
    One day after water change: ph 6.6 / gh 5 / kh 4 / no3 5 / po4 0.6

    Fourth week results:
    Before water results: ph 6.6 / gh 6 / kh 6 / no3 5/ po4 0.8
    One day after water change: ph 6.6 / gh 5 / kh 5 / no3 4 / po4 0.7

    As you can see the Po4 and No3 has been lowering ever since I started using a mix with more osmose then tap water (started second week). According to the EI-standards I’m having a rather big No3 deficiency and a minor Po4 deficiency. I have the following solutions made: Po4: 1.24ml raises the kpo4 with 0.1 on 62l (my tank) and No3: 1.24ml raises kno3 with 2 on 62l. What would you advise in this situation?

    As for the lighting, I did change one of the tl-bulbs two weeks ago due to the fact that it was over one year old and while I was at it, I also cleaned my reflectors as well.
     
  4. dutchy

    dutchy Plant Guru Team
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    I'd add 50% more weekly. Maybe the sudden light increase made the plant stunt. I'd wait for now and see how it develops when the plant adapts.
     
  5. Pilaarbijter

    Pilaarbijter New Member

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    That's the thing really, I'm not adding any Kno3 or Po4. I just have this values without adding anything to the water.
    Only thing I do add is this: http://www.aquariumbemesting.nl/bemesting-poeder-zelf-mengen/complete-plantenvoeding.html
    I add 4ml once in two days. That's it.
    Should I slowly build up the dosing of No3 and Po4 to for example 8 no3 and 1 po4 or just go for the values straight away. I am however scared that my co2 installation might not be sufficient and thus causing algae.

    Another thing I would like to clarify is that only the new leaves (the more deeper red ones) are stunting. The older green colored ones are in great state with the veins beautifully showing. The ludwigia is the only one 'not behaving' as it should. The rest of the plants are doing really fine.

    These are the plant i currently have:
    Alternanthera cardinalis
    Anubias barteri var. nana
    Cabomba Aquatica
    Cryptocoryne wendtii
    Eleocharis parvula
    Heteranthera zosterifolia
    Lobelia cardinalis
    Ludwigia mullertii
    Saururus cernuus
    Unidentified Echinodorus-species
     
  6. dutchy

    dutchy Plant Guru Team
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    You can start to dose right away, no buildup is necessary. A plant will take up as much as it can dependent of the amout of light, which drives photosynthesis. If you are afraid the CO2 is insufficient, use low light, don't hold back on ferts.
    Better of course is when the CO2 is sufficient at any time.

    Also every plant has it's own need of CO2. So it can be that one plants curls (stunts) while the others don't. Competetion for CO2 is also a variable. We should provide an environment in which all plants can thrive. This is possible by providing enough CO2 and ferts, even for the plant with the highest demands.
     
    #6 dutchy, Mar 18, 2012
    Last edited by a moderator: Mar 18, 2012
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