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WTB calcium nitrate

Discussion in 'General Plant Topics' started by yme, Jan 4, 2011.

  1. yme

    yme Lifetime Charter Member
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    do you know a shop where you can buy Ca(NO3)2.4H2O??

    sites one the www (like aquariumfertilizer.com) sell calcium nitrate, but when I ask, it alwyays turns out to be 5Ca(NO3)2.NH4NO3.10H2O.

    NH4: brrrrrr.... I don't want to add NH4. (at least, we have been told that it induces algae)

    on ebay I found a seller: but that was quite expensive (20 dollar for 500 gram) and would only ship to the USA.

    greets,

    yme
     
  2. barbarossa4122

    barbarossa4122 Guru Class Expert

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  3. barbarossa4122

    barbarossa4122 Guru Class Expert

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    update;

    GLA sells CaNo3 (15.5-0-0) whatever that means.
     
  4. Biollante

    Biollante Lifetime Charter Member
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    Outdated Fert Packaging Law

    Hi,

    N-P-K

    !5.5% N- 0% P- 0% K :)

    I am not sure why since by molar mass it should be 13.72% N- 0% P- 0% K with Calcium making up 39.26% and Oxygen 47%.

    I seem to recall an oddity in how the US government calculates N-P-K, just cannot recall.

    Biollante
     
    #4 Biollante, Jan 4, 2011
    Last edited by a moderator: Jan 4, 2011
  5. essabee

    essabee Prolific Poster

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    In the agricultural fertiliser system; NPK percentage of 15.5 : 0 : 0 fertiliser means 15.5 % N2O : 0% P2O5 : 0% K2O in the fertiliser formulation which may have impurities.
     
  6. barbarossa4122

    barbarossa4122 Guru Class Expert

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    Now, I know. Thanks guys.
     
  7. Biollante

    Biollante Lifetime Charter Member
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    Weight Not Molar Mass--Nitrous oxide That Is Funny!

    Hi All,

    Just Goggled the NPK calculation it is, in the US anyway, by weight not molar mass.

    I knew this:eek:, honest...:p

    So if you have a 100 pound bag of 15.5% N- 0%P- 0%K it would make no difference what the source of the Nitrogen is, 15.5 pounds of that fertilizer is N, it does not matter what the other components are as long as they are not P or K, they will not show up.:rolleyes:

    This is among the reasons a number of non-traditional fert suppliers are lobbying hard for a change in the labeling law.:eek:

    Biollante
     
    #7 Biollante, Jan 4, 2011
    Last edited by a moderator: Jan 4, 2011
  8. yme

    yme Lifetime Charter Member
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    hi!

    from wikipedia:
    The fertilizer grade (15.5-0-0 + 19% Ca) is popular in the greenhouse and hydroponics trades; it contains ammonium nitrate and water, as the "double salt" 5Ca(NO3)2.NH4NO3.10H2O. Formulations lacking ammonia are also known: Ca(NO3)2.4H2O (11.9-0-0 + 16.9%Ca).

    so I think that the calcium nitrate from greenleafaquariums is also the NH4 containing stuff.... :(

    greets,

    yme
     
  9. Gilles

    Gilles Lifetime Members
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  10. yme

    yme Lifetime Charter Member
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    this part??
     
  11. Gilles

    Gilles Lifetime Members
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    No the entire thread;
     
  12. yme

    yme Lifetime Charter Member
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    yeh.... that seems a bit BS...

    it's like saying: don't use GH-booster because it increases the TDS too much.

    if you use Ca(NO3)2.4H2O and add enough to increase NO3 by 10 mg/l.... then you add 3.2 mg/l Ca. Or 0.4 GH.

    greets,

    yme
     
  13. Gilles

    Gilles Lifetime Members
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    Oke, i am not familiar with Ca(NO3)2.4H20 so i just wanted to warn you ...
     
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