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EI Dosing Question

Discussion in 'Advanced Strategies and Fertilization' started by PaulB, Feb 22, 2005.

  1. PaulB

    PaulB Subscriber

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    I have a dosing question re my tank.
    It is a
    3'x14"x18" (LxWxH)
    Lighting: 1x AH 96w 6700K CF & reflector and 1x 30w 6000K fluro tube
    Laterite substrate with 3" layer of LFS 1/8" gravel
    Water Parameters:
    Ph 6.8
    Kh 5.5 dgh
    Gh 7.0 dgh
    Phos .5 - .75 ppm
    Nitrate 10ppm

    50% water change once a week
    I dose with sechem flourish Phosphorus, Potassium and Nitrogen 4x week 10mls each and flourish 10mls 3x week.
    Riccia tied to rock on bottom of tank pearls from about 3 hrs after lights on.
    Little or no algae of any type in tank, but plant growth seems very slow. Although all plants show good pearling during lighting period. Lights are on a timer on for 12hrs. Co2 is via DIY yeast system.

    Am i dosing sufficient trace elements (ie flourish 10ml 3x week) ?
    or is it possibly a mineral deficiency problem. I have been following the EI method for about 7 weeks now.
    Also what is the best of the following test kits for phosphate - sechem, dupla, aquarium pharmacuticals or red seas?

    Any ideas where my problem/s maybe.
     
  2. Tom Barr

    Tom Barr Founder
    Staff Member Administrator Social Group Admin

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    Re: EI Dosing Question

    CO2.

    DIY CO2 and slow growth point to that.
    I'd make very sure that the CO2 is good and consistent all day and all week long. Up the NO3, PO4 and K+ by about 2x.

    KNO3, KH2PO4 are much cheaper from www.gregwatson.com also.

    Regards,
    Tom Barr
     
  3. PaulB

    PaulB Subscriber

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    Re: EI Dosing Question

    Hi Tom, Have changed to a pressurised CO2 system PH 6.8 (tested in middle of lighting period) Kh 6.0 which equates to approx 29ppm CO2. Is this high enough or should i raise the kh and bubble rate? If so how high do i go?

    Also looking around for source of dry fertilizers. Have tried hydroponics shops, but not having much luck (here in Australia), wil try fertilizer suppliers.
     
  4. Laith

    Laith Lifetime Charter Member
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    Re: EI Dosing Question

    Greg ships to Europe. Maybe to Australia too? send him an email...
     
  5. PaulB

    PaulB Subscriber

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    Re: EI Dosing Question

    Have checked with Greg, and yes he ships to Australia. I will try local fertilizer supplies first. What i cannot get locally i will order from Greg.
     
  6. Tom Barr

    Tom Barr Founder
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    Re: EI Dosing Question

    When you get them:
    Add 1/4 teaspoon 3x a week of KNO3, at the same time add 1/16" KH2PO4.
    On off day add 7 mls of traces.

    50% weekly water change.
    CO2 sounds good, ..........for now keep an eye on it
    Regards,
    Tom Barr
     
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