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Yet another EI dosing Q!

Discussion in 'Advanced Strategies and Fertilization' started by magnolia95, Sep 3, 2005.

  1. magnolia95

    magnolia95 Junior Poster

    Aug 29, 2005
    Likes Received:
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    7:41 AM
    Just trying to get my head around ppm using the Fertilator....

    Have I got this right:

    If I dose according to the suggestion in Tom's article for a 20G high light tank, this is:

    1/4 teaspoon of KNO3 3-4x a week (every other day) equates to 10ppm NITRATE, 6.6ppm POTASSIUM per dose


    1/16th-1/32nd teaspoon of KH2PO4 3-4x a week (every other day)

    Say I use 1/32nd amount then this equates to 1.6ppm PHOSPHATE, .66ppm POTASSIUM per dose.

    Do I just add up the amounts to get the total ppm per dose? and is that enough potassium?

    If I use Seachem Equilibrium how do I calculate how much Ca, Mg, and K I am adding? On the bottle it gives concentrations as percentages e.g. Ca 8.06%.

    I know I might not need to know how much in the Equilibrium if I put enough in, but I'm nosy! I like knowing these things :)

    Thanks for any help,

  2. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Jan 23, 2005
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    Local Time:
    7:41 AM
    Re: Yet another EI dosing Q!

    Try emailing SeaChem directly, they changed their K+ formulation some. I use it like I would K2SO4 although it adds less K+ obviously.

    If you follow the recommendations, the K+ should come out close to NO3. And over time and if you address the 03 and go molar ratios N:K, we see that K+ is in a huge excess relative to ratios and plant needs.

    The leveling off of K+ will be higher than N since less is needed by the plant over time(see the graphs for EI as they progress through time).

    Basically less K+ is used relative to N in the dosing routine.

    Tom Barr

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