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  1. steve todd

    steve todd Member

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    good morning

    I have a 670lt low light setup using pressurized c02
    I have only anubais on driftwood and some java fern
    Had these plants over a month now none of them show any new growth
    Some of the leaves are yellow. Fish are all discus

    C02. 15-20ppm Using the Rotala. C02 calculator
    I dose
    NO3. 20ml 2x weekly
    K2P04. 20ml 2x weekly
    Aquagreen’s amgrow 20ml 2x weekly
    50% waterchange weekly
    Lights on for 6 hrs
    4kh
    C02 Controlled using a PH controller
    Why isn’t there any sign of new growth
     
    #1 steve todd, Apr 1, 2018
    Last edited: Apr 1, 2018
  2. Allwissend

    Allwissend Article Editor
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    Hi. It looks like all the things are there. I am a little unclear by what you mean by 20ml NO3 and PO4. It would be more informative to provide the actual mg/l or ppm. You can use a calculator like rotalabutterfly.com to figure it out.

    It could be that there is simply too little light. These plants also take their time adapting to new conditions. Are old leaves yellow or new ones ?
     
  3. steve todd

    steve todd Member

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    7.5ppm kno3 2x weekly
    0.2ppm Aquagreen’s amgrow 2x weekly
    1.3ppm kh2p04 2x weekly
    Old leaves yellow
     
    #3 steve todd, Apr 2, 2018
    Last edited: Apr 6, 2018
  4. Allwissend

    Allwissend Article Editor
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    Interesting. I would not think that with 15ppm NO3 per week and a discus tank the Anubias would run out of N. However, old yellow leaves are usually associated with N deficiency. Maybe CO2 needs to be increased as well, hower Anubias is not a CO2 demanding plant.

    What about GH ? Do you dose any Mg ?
     
  5. steve todd

    steve todd Member

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    4dkh of GH. Don’t dose MG
    What should I increaseC02 to ATM between 15-20ppm
    Cheers
     
    #5 steve todd, Apr 4, 2018
    Last edited: Apr 6, 2018
  6. tiger15

    tiger15 Member

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    One month may not be not enough to see growth, even if you’ve done everything right. New plants need transition to your tank environment. If your plants were emerged grown, it will take even more time and some leaves may even die off before replacing with water leaves.
     
  7. Allwissend

    Allwissend Article Editor
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    Thank you for your answer steve todd. Just to be on the safe size I would start by dosing a little Mg say 4mg/L (ppm) once per week after water change. You can get Mg from Epsom salt (MgSO4*7H2O) and use the rotala calculator to figure out how much you need to add. Mg deficiency will cause yellow/ white patches on old leaves

    What is the pH set in the pH controller and what is the pH of degassed water ? A 1 pH drop should be enough.

    Anubias are slow metabolism plants, even in optimal conditions they will grow slowly and take their time.
     
  8. steve todd

    steve todd Member

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    PH on controller set at 6.8 not sure on what u mean by degassed water using the Rotala calculator I have C02 of 15-20ppm,I’m trying to use Rotala calculator to get a solution of MG but watever. numbers I use it doesn’t change from 5ppm using the lowligh\weekly
     
    #8 steve todd, Apr 10, 2018
    Last edited: Apr 10, 2018
  9. Allwissend

    Allwissend Article Editor
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  10. steve todd

    steve todd Member

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    All good thanks. can i make this into a solution


    Cheers
     
    #10 steve todd, Apr 10, 2018
    Last edited: Apr 11, 2018
  11. Allwissend

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    Yes, it is pretty soluble in water, just select large dose volume and you should be safe. The solubility is above 100g/100mL for the MgSO4*7H2O (Epson salt) form
     
  12. steve todd

    steve todd Member

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