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Calculate EI dosage for Tropica AquaCare Plant Nutrition+ N and P

Discussion in 'Aquatic Plant Fertilization' started by Ville, Mar 4, 2010.

  1. Ville

    Ville Junior Poster

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    Hi!
    I've been using Tropia's "AquaCare Plant Nutrition+ with N and P" for a while but I can't settle on the right dosage. They recommend 5ml / 50L every week but it seems to be to little for a highly planted tank.

    In the declaration some percentages are specified but they are all specified in the sole periodic elements.
    I can calculate the ppm values of the amount I add to my tank every week but I don't know how this stands in reference to the recommended target ranges

    NO3 range 10-30 ppm
    K+ range 10-30 ppm
    PO4 range 1.0-2.0 ppm
    etc.

    The declaration looks like this:

    W/W% (Gew/Gew%, P/P%)

    N: 1.34%
    P: 0.10%
    K: 1.03%
    Mg: 0.39%
    S: 0.91%
    B: 0.004%
    Cu: 0.006%
    Fe: 0.07%
    Mn: 0.04%
    Mo: 0.002%
    Zn: 0.002%

    HEEDTA, DTPA, E123

    250ml = 260g
    500ml = 520g


    I'm actually studying physics so I guess I should be able to calculate this myself but I'm not sure if I can only add the weight of the oxygen to N in order to get the NO3 value etc. I might be confusing myself.

    I would be thankful for any pointers here.
     
  2. Philosophos

    Philosophos Lifetime Charter Member
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    Ya, if you add the mass of O3 to N then you'll get your total NO3.

    I've actually got a spreadsheet to calculate dosage, Tropica was nice enough to include density in their product info *.pdf so that made life easier.

    Here's what 1mg/L of TPN+ will give you:

    Nutrient PPM

    NO3 61.692015
    PO4 3.188839
    K 10.712000
    Mg 4.056000
    S 9.464000
    B 0.041600
    Cu 0.062400
    Fe 0.728000
    Mn 0.416000
    Mo 0.020800
    Zn 0.000020

    I'd say 1mg for every 2-3L is a good dosing range for this stuff. It really could use more P and K; you should find another source for bulking both of those up. KH2PO4 and K2SO4 would be ideal, if you can't access it then it's a matter of your brand of choice.
    Here's what 1mg for every 2L gives:

    NO3 30.846007
    PO4 1.594420
    K 5.356000
    Mg 2.028000
    S 4.732000
    B 0.020800
    Cu 0.031200
    Fe 0.364000
    Mn 0.208000
    Mo 0.010400
    Zn 0.000020
     
  3. Tom Barr

    Tom Barr Founder
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    You are going to pay a lot for that dosing.
    Most use dry ferts instead.

    Regards,
    Tom barr
     
  4. jonny_ftm

    jonny_ftm Guru Class Expert

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    I also switched from TPN to CSM+B for my 60gal tank. TPN costs too much compared to dry ferts. TPN+ costs even more because of the need of high N and P in our tanks compared to the low dosing of N and P in TPN. You'll waste micro to dose decent N and P

    I kept my remaining stocks of TPN for my 12gal nano + some DTPA i finally got from Rex
     
  5. Ville

    Ville Junior Poster

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    Thanks guys!
    I have a 250L tank do I guess TPN+ will be extremely expensive in the long run as you said Tom. A switch to dryferts seems to be the way to go then.
    Now at least I know what i put into my tank. I figured i might need to add more macros but I couldn't figure out how much.
     
  6. Tom Barr

    Tom Barr Founder
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    Dosing calculations are also easier, more comparative when you use raw chemicals, less $ for shipping etc(10-20X less).
    So you save several ways.

    Regards,
    Tom Barr
     
  7. barbarossa4122

    barbarossa4122 Guru Class Expert

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    I am also using TPN and I am looking into Pfertz to supplement that, since TPN is so very expensive. And yes, I do have CSM+B also. Anyway for some reason I feel better to dose liquid commercial for micros.

    I am also looking to subscribe to the Barr report:)
     
  8. Tom Barr

    Tom Barr Founder
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    NO3 is still NO3, no matter what the brand name is...........

    Regards,
    Tom Barr
     
  9. Philosophos

    Philosophos Lifetime Charter Member
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  10. Ville

    Ville Junior Poster

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    Thanks Philosophos!
    I ordered the dry ferts from http://www.aquawarehouse.se a couple of days ago. It might take some time before I get them since I also ordered some plants. Apparently they don't ship plants if the temperature is to low outside and they're located in the north of sweden where it's quite cold at the moment. I think making a mixture once I get them should be an easy task thanks to all the amazing info on this forum.
     
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