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Rolling Custom Micros

Discussion in 'General Plant Topics' started by notg2009, Mar 7, 2021.

  1. notg2009

    notg2009 New Member

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    Hi everyone,
    Long post, sorry! Thanks for your inputs in advance.

    Contemplating mixing my own micro batch based on the work of @burr740 and guidance from @Greggz (thanks to both). Why? Because I like to go down the rabbit-hole!! Here is what I have received as the final version (for now):

    Elements........Compound.........Joe's ppm
    Fe DTPA........................................0.01
    Fe Gluc..........................................0.05
    MN.................MnSO4.H2O...........0.025
    B.................Na2B4O7.10H2O.......0.027
    Zn...................ZnSO4.7H2O..........0.023
    Cu...................CuSO4.5H2O.........0.0019
    Mo...............Na2MoO4.2H2O......0.001
    Ni.....................NiSO4.6H2O........0.00025

    Multiple questions (want to dose daily)
    1. My pH remains under 6.7. Thinking about Fe DTPA (0.05 daily probably). Why use gluconate if it is only stable under pH of 4.5?
    2. How much ascorbic acid and potassium sorbate to add to avoid mold? Is there a formula somewhere?
    3. Mix all together or keep separate? Especially Fe.
    4. Too much SO4? (considering I use sulfate salts of calcium and magnesium too)
    5. Why do some people add CaCl2?
    6. Some amounts in milligrams are miniscule when measured using the rotalabutterfly calculator!! How to measure even with a milligram scale? Make a concentrated solution with larger amounts and dose smaller volumes?

    My tank (setup 3 months ago):
    -16.75 gallons of water in a 20 long and canister and reactor
    -RO water mineralized (Ca 20ppm and Mg 10ppm)
    -GH 7
    -KH 0-1 (K2CO3)
    -pH ~6.2 before CO2 turns on and about 5.1 right before CO2 turns off (off-gassed 6.7) (all measured using a recently calibrated Milwaukee mc122)
    -Over 50% plant mass at the moment
    -Platinum soil with osmocote and clay underneath
    -NO3 1ppm daily (KNO3), and the salifert kit reads at 2.5ppm usually at the end of the day
    -PO4 dosing 3ppm (KH2PO4) daily and API kit reads about 1ppm toward the end of the day usually
    -WRGB II 60cm lights

    Currently dosing these amounts using csmb (daily)
    Fe 0.02
    B 0.0035
    Mn 0.0057
    Mo 0.0002
    Zn 0.0011
    Cu 0.0003

    Thanks for all the help.

    Omid[​IMG]

    Sent from my Pixel 4 XL using Tapatalk
     
    jbs47 likes this.
  2. FischAutoTechGarten

    FischAutoTechGarten New Member

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    I love your plantings.... Now I have to do some searching on this site to see what it is that you have planted...
     
  3. notg2009

    notg2009 New Member

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    Thanks for the compliment. I have the following:
    Tonina fluviatilis, tucantis, lotus
    Ammania praetermissa (emersed, transitioning) and pedicellata golden
    Pantanal was pulled!
    Blyxa japonica
    Ludwigia senegalensis
    Aciotis acuminifolia
    Lobelia cardinalis
    AR mini
    Ludwigia white
    Rotala ramosior cramer
    Rotala macrandra variegated
    Rotala wallichii
    Downoi
    Blood vomit
    Mixed buce

    Omid
     
  4. Zeus

    Zeus Lifetime Members
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    Might be worth trying the IFC calculator which does all the calculations and serial dilution for making your own DIY trace mix

    upload_2021-3-21_13-38-30.png

    As long as you add Potassium Sorbate (E202) 0.4grams per litre and Ascorbic Acid (E300) 1.0gram per litre of fert/AIO solution, which will decrease the pH of your DIY fert mix and prevent the interactions with Fe and PO4 and stabilise the solution ( and reduce the chances of mould).

    For an AIO ( All In One) fert mix together, best done IMO for fert mixes which are well below EI levels
    For EI levels best to separate Macro and Micro ferts as Fe and PO4 do interact esp in a concentrated solution. You can still dose them on the same day but need to be a least 2 hrs apart.

    Using CaCl2 reduces the SO4 levels whist still hitting the Ca levels, with a resultant increase in Cl (remember Cl is chloride and not chorine- CaCl2 has ionic bonding whilst Cl2 has covalent which changes if properties)

    Not a big fan off this, a fert solution lasting longer than 2 months is more prone to issues, a larger volume is easier to mix and dose with salt solubilities etc, Plus it acts as a little auto top up as well. I like to dose in units of 10, eg 10ml or 100ml then increasing/decreasing the dose say 10% is so easy

    Remember Fe DTPA is light sensitive as well, so keep fert mix in a dark place. once dosed your fine as plants have had their fill in a couple of hours
     
    notg2009 likes this.
  5. notg2009

    notg2009 New Member

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    Thanks for all the info. Will look into the calculator.

    Omid
     
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