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Need help with KNO3

Discussion in 'Aquatic Plant Fertilization' started by kleb, Aug 15, 2016.

  1. kleb

    kleb Junior Poster

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    Hi plant gurus,


    I want to switch to dry ferts for macros, but I can only find 3 options where I live. Which one is the most appropriate?


    NPK:


    a) 13-2-44


    b) 12-0-45 plus 1.2%S


    c) 12-0-43 plus 1%Mg and 1%S


    Thank you!
     
    #1 kleb, Aug 15, 2016
  2. Pikez

    Pikez Rotala Killer!
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    Options B and C have no Phosphate, so that's a problem.


    What is the N source in A? If it is Urea or Ammonia based, you may have a toxic situation if your pH is high. And possibly some algae issues.
     
    #2 Pikez, Aug 15, 2016
  3. kleb

    kleb Junior Poster

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    Option A is from Haifa and it is partly ammoniacal:
     
    #3 kleb, Aug 15, 2016
  4. kleb

    kleb Junior Poster

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    My PH is around 6.8 to 7.0. Would be a problem to use the option A?
     
    #4 kleb, Sep 9, 2016
  5. kleb

    kleb Junior Poster

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    I can complement Phosphate from another product. By the way, would the Sulfur in options B and C be safe for shrimps? Thank you!
     
    #5 kleb, Sep 9, 2016
  6. Pikez

    Pikez Rotala Killer!
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    I would be nervous about adding ammoniacal nitrate forms, even if it is at low levels.
     
    #6 Pikez, Sep 9, 2016
  7. kleb

    kleb Junior Poster

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    Thank you Pikez. I will go with option C, as the manufacturer confirmed the source of nitrogen as 100% nitric, no ammonia or urea. I will complemente P with another product. Do you know if the Sulfur in this option is safe for shrimps? Thanks again!
     
    #7 kleb, Sep 12, 2016
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