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Excel tank problem

Discussion in 'CO2 Enrichment' started by Henry Hatch, May 16, 2007.

  1. Henry Hatch

    Henry Hatch Guru Class Expert

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    I've got a problem with my 20 gallon excel tank which I converted from a Walstad type tank about 2 months ago. I'm getting very little growth for the most part, I have an H. difformis which looks wilted and growth is pretty much stunted all around. I see no yellowing of leaves or signs of decay. I do 50% water changes/week. Gh is 3.

    I dose the following for 20 gallons:

    excel - per instructions
    tropica - 2 ml x2
    k2so4 3/8 tsp x1

    I had to stop dosing N and P because my levels have been running very high. I'm currently adding K2SO4 since I'm not dosing KNO3. I don't believe I'm overfeeding or am overstocked. I suspect there may be some other nutrient problem intefering with N uptake, but I don't know what it might be. Calcium, Mg ? I thought this sort of stunted growth woul indicate a Macro nutrient problem. I'm stumped.


    Henry
     
  2. aquabillpers

    aquabillpers Lifetime Charter Member
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    Your tank sounds very much like the 10 gallon I posted about

    What is the substrate?

    How much light?

    And, how did the soil-based tank work for you?

    Bill
     
  3. Henry Hatch

    Henry Hatch Guru Class Expert

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    My substrate is eco complete. Light is 2.2 watts of NO flourescent. I have never used soil as a substrate.

    Henry
     
  4. Henry Hatch

    Henry Hatch Guru Class Expert

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    It's been a long day. Light is 2.2 watts/gallon of no flourescents.
     
  5. Tom Barr

    Tom Barr Founder
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    So what about the water changes and what about the Excel dosing rates?

    Try doing 50-70% weekly water changes, dose the KNO3/KH2PO4/Traces Excel.
    Assume a 1/3 the EI dosing rates.
    Add 1.5 labeled rate for the Excel.

    Regards,
    Tom Barr
     
  6. Henry Hatch

    Henry Hatch Guru Class Expert

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    I have always done 50% water changes. I will try 1.5 rec. dose for excel My nitrates were always well in excess of 40 ppm just prior to water change when dosing. Phosphates have never tested lower than 1.5 ppm when dosing. I use Lamotte tests and also tested with a hobby kit. N and P are always high no matter what test I use.
     
  7. aquabillpers

    aquabillpers Lifetime Charter Member
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    I am not a priest in the Walstad religion nor am I a purist in most things, but if you ". . . never used soil as a substrate . . " then you did not have a Walstad-type tank. Soil substrates are basic to the Walstad approach.

    Bill
     
  8. VaughnH

    VaughnH Lifetime Charter Member
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    It sure seems like your plants are starved for something. You have plenty of light, a good substrate, and Excel works as a carbon source, so if I were you I would try dosing KNO3 and KH2PO4 for a month, just to see what happens. With only Excel for carbon the plants won't grow at top speed, so you won't need the full EI dosage of any fert, but dosing half that amount should work, if that is the problem.
     
  9. Henry Hatch

    Henry Hatch Guru Class Expert

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    You are correct. I used the term loosley. I was referring to Tom's article regarding non co2 tanks.

    Henry
     
  10. Henry Hatch

    Henry Hatch Guru Class Expert

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    Thanks,

    I am sometimes amazed at my own ineptitude at keeping plants. I'm not sure if I have the skills to do this. I must say Tom has done a great deal to help people like me who have the black thumb of death. I've had some successes, but I seem to go endlessly from one problem to another.
     
  11. Tom Barr

    Tom Barr Founder
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    Generally, if you stick with a routine, give it time, do not depend too much on test kits, do not change things all the time(in the tank, the scape, the fert routines), are consistent, that's about all you need.

    These are not method issues, these are people issues.

    Many folks carry on about "their method" however, what really is the issues for lack of success is much more based in social sciences rather than the biological kind.

    We all are feeble minded to a large extent.
    At least I can only speak for myself, but others are also willing to admit it:)

    Regards,
    Tom Barr
     
  12. Henry Hatch

    Henry Hatch Guru Class Expert

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    Thanks for your thoughts. I will heed your words.

    HH
     
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