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Dosing 3 X Week vs 1 X Week Using EI

Discussion in 'Estimative Index' started by rjordan393, Jun 10, 2014.

  1. rjordan393

    rjordan393 Guru Class Expert

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    Hello,
    If one were to add up the total weekly dose of NO3 and PO4 using EI and added it all at once on water change day; would this cause a problem?
    I do water changes at 67% on a tank volume of 64 gallons every two weeks. In the 2nd week, I test these nutrients using Hach test kits and adjust the values to the EI.
     
  2. Gerryd

    Gerryd Plant Guru Team
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    I would be concerned about a loss of water column nutrients by the end of the week. Why not use you hach tests after dosing and at the end of the week and see?

    That said, the whole idea of EI is NOT to spend time testing..Up to the individual of course, but there is no reason to do so if EI is followed correctly.

    - - - Updated - - -

    I would be concerned about a loss of water column nutrients by the end of the week. Why not use you hach tests after dosing and at the end of the week and see?

    That said, the whole idea of EI is NOT to spend time testing..Up to the individual of course, but there is no reason to do so if EI is followed correctly.
     
  3. rjordan393

    rjordan393 Guru Class Expert

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    Actually I do test the last day of the week but adjust it the first day of the 2nd week. I am using the 40 t0 60 gallon EI method and that is slightly less then my 64 gallons. So using Wet's calculator, it calls for 6.58 ppm No3 and 2.02 ppm PO4 3 X a week. But I would like to dose the total of both all at once and that would be 19.7 ppm NO3 and 6.06 ppm PO4. So I would like to know if that would cause a problem. The reason for this is twofold. I like to cut down on maintenance time and I want to see if increasing my PO4 parameter from 3 ppm to 6 ppm and see if my plants respond better by the possible elimination of green spot algae and black spot algae. So if my PO4 drops to 3 ppm at the end of the week, hopefully my plants may still show improvement and the PO4 level will be adjusted the following day. I am also planning to do the same with Fe dosing and dose all at once but only if it does not cause problems.
    If testing indicates I should go for the 60 to 80 gallon method, then I will do so.
     
  4. Tom Barr

    Tom Barr Founder
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    2x a week works well, 1x a week, not so good over time.

    Plenty tried.

    all my tanks are dosed 2x a week for the macros.
    Traces, most days I remember and bother to do it.
    Feed fish 2-3x a day.

    I dose 5 ppm of PO4 and 15 ppm of NO3, then about 1 table spoon of GH booster per 60 Gallons.
     
  5. rjordan393

    rjordan393 Guru Class Expert

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    Thanks,
    I'll give that a try.
     
  6. Tom Barr

    Tom Barr Founder
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    That's a total of 10 ppm PO4 and 30 ppm of NO3 per week as dry ferts.

    Not 5 ppm PO4/15 ppm NO3 total for the week, but per dose.
     
  7. rjordan393

    rjordan393 Guru Class Expert

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    Thanks,
    That is the the way I read it for the macro's. Now I have to experiment with the micro's. it may be I was not dosing enough. So I will use the Fe as a measure for all the micro's and dose 0.4 ppm per week to see where this takes me.
     
  8. GR1KTR

    GR1KTR Prolific Poster

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    I think Micros in particular should be dosed more often than once per week. They quickly become ineffective compared to Macros. This is especially true of Fe.
     
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