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Hydroponically Based Npk Ratio

Discussion in 'Aquatic Plant Fertilization' started by Justin gililland, Dec 30, 2018.

  1. Justin gililland

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    So a week ago i decided to play with some fertilizer regimes based on a hydroponic npk ratio aimed at foliar growth, that ratio was 9-3-6 however i didnt think about the numbers being % based not ppm so i made the first chart listed and dosed a reduced dose of 2/3(2nd chart) and it worked very well over the last week and 3rd pic will be a photo showing growth over 7 days 1 before and 2 after starting(top to bottom).
    Tank info for my 40:
    gh 4, kh<1, tds ~120, ph gassed 5.8, 32" sbreef currently 75% but have been running 100% giving 364 par at substrate midday. Ch1 8am-4pm ch2 10am-2pm(i might ha e changed this for a longer midday photoperiod i cant remember), supplemental far red led bulb in desklamp for 2 hrs at end of photoperiod(1 hr with ch1, 1 hr after main light is off), ada aquasoil, about 35sp. Of plants dont feel like cou ting right now lmao many are rare uncommon or picky. I do all of this from overseas so my wife is my hands which depending on her willingness can be a downfall at times lol.

    However i realized that my dosing regime last week i made off of some slightly confused elements, my npk ratio i based it from was % not PPM so when i made a dosing regime based on PPM it was wrong even though it did work, however i had to convert it to PPM and re-create the breakdown and dosing regime i included as much info as i could to explain what the quantities of everything is and i compared it by percentile vs standard ei weekly via weekly ppm and my ppm(displayed bottom right by % above or below ei) the dose for last week was off but it worked so i have hopes for this as im dosing it to a similar ppm of weekly K to start here is a tank pic of the 40 and 120(pic to follow shortly) this morning and the sheet showing info for new dosing (the 120 will be starting this tomorrow to see if it bosts growth and such like it did the 40)

    I will try to update daily photos atleast and if any issues occur.

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    rajkm likes this.
  2. Justin gililland

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    The baseline pic before starting the 120 on this tomorrow it has been neglected so some attention may help lol

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  3. Justin gililland

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    Just got a wc on the 40 so i was able to get some photos of both channels on as opposed to tge red/blue dominant single channel pictured above

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  4. Justin gililland

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    I forgot to post tds baseline yesterday measured monday morning post waterchange on sunday and after adding CaCO3 to 1dgh/kh in both tanks sunday so we can track tds rise to indicate fertilizer buildup(if any) come sunday morning
    40 tds 117
    120 tds 183
     
  5. Justin gililland

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    So its sunday nkw pre WC for both tanks... the 120 unfortunately didnt get co2 funtil friday as the wife forgot to plug it back in last weekend lmao so theres not much change there... and the 40 had a filament algae bloom probably bc i forgot to put MgSO4 on the dosing sheet so it wasnt dosed all week so plant uptake may have been limited.
    but as far as tds...
    40 tds 183 +36%
    120 tds 225 +19%
    So despite not adding Mg all week by accident i forgot all about it and despite not having co2 in the 120 im still going to reduce my macro dosing in the 40 and 120 accordingly by the cooresponding / increase we had. The new macro dose will be at the bottom of the sheet shown below with the old macro dose at the top.
    We will add a full dose of MgSO4 after wc along with the weekly sunday addition of CaCO3, take a tds reading tomorrow morning before dosing macro, observe growth throughout the week measure tds sunday morning again before wc and see what the results are... this week i will geta front pic of both takes once a day and show in order in a single comment come sunday.
    Also for the record the ludwigia cuba is getting chopped down and is the only plant getting trimmed.

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  6. Justin gililland

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    Also for the dosing sheet, i dose by weight but the wife prefers spoons for some reason lol so thats why its shown in TSP
     
  7. Justin gililland

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    Alright starting the new lower dosage, mgso4 was forgotten yesterday but CaCO3 was added told her to pick of with mg tomorrow lol but.... starting tds for this week is


    120 tds 164

    40 tds 113


    Hopefully the mg rhis week drives growth up out competing the filament algae that popped up last week

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