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Discussion in 'Talk to Tom Barr' started by Henry Hatch, Nov 15, 2006.

  1. Henry Hatch

    Henry Hatch Guru Class Expert

    Aug 31, 2006
    Likes Received:
    Hello Tom,

    After numerous failed attempts at growing plants, I discovered Estimative Index.
    It works. My tank has been set up for about 3 months. I have traces of algae and very strong plant growth. I ran into a bump in the road recently with a mild case of blue green algae. I dosed the tank with erythromycin for 5 days and it looks like the stuff is gone. However, I want to be sure it does not come back now that I have completed the dosing regimen.

    Since this stuff is actually a bacteria rather than a true algae, should I continue my
    EI dosing regime ?

    My tank is a 30 gallon very heavily planted tank with 60 watts of light and co2 levels normally above 30 . I have been dosing nitrates at 15 ppm, iron at .3, phosphates at 1.0 and potassium at 15ppm. I also dose with Flourish 8 ml. My GH and Kh are 4-5. I dose once/week.

    I check N,P ,and Fe regularly with Laomotte tests.

    Should I make any changes ?

    Henry Hatch

  2. Tom Barr

    Tom Barr Founder
    Staff Member Administrator Social Group Admin

    Jan 23, 2005
    Likes Received:
    Glad you have decent test kits.

    Oner thing about EI, you'll need to dose 2x a week, not once, at the end of the week you should be bottoming out on the NO3/K.

    PO4 limitation does slow NO3 uptake down and CO2 uptake as well, but the plants tend to do okay with low PO4.

    But just divide the EI dosing into 2 or 3x a week routines, with about 30 ppm of NO3 as the target total for the week.

    You likely have 2ppm a day removal, so this will maintain about 5-10 ppm and a max build up of about 30 ppm for this tank given the comments you have made thus far.

    You may do larger than 50% weekly if you wish once every month etc or each week etc if you so chose.

    I tend to do larger water changes, clean things real good, stay on top of things well when I have any issues pop up.

    Mild BGA really is not a blackout or Antibiotic issue, it's typically solvable with CO2/Nutrients and good cleaning a few times, vac the substrate etc.

    Tom Barr
  3. Patrice

    Patrice Guru Class Expert

    Jan 6, 2006
    Likes Received:
    I can confirm it work better to dose many time than once a weak. before I dosed my ferts once every weak for Co2 tank. result were not bad but I had algae once in a while and allwais green spot algae here and there.
    Now, I dose macro every 2 days and micro every other days. it work just way beter.

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