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Need help for KH with ADA aquasoil

Discussion in 'Sediment / Substrate' started by Coasters13, Jul 25, 2017.

  1. Coasters13

    Coasters13 Member

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    Hello,

    I did a research on the forum but I did not find the answer of my question

    I'm starting a new aquarium with ADA aquasoil (my first one)

    I do the mineralization and fert by myself

    for GH I mixed CaSO4 and MgSO4 with a ratio 3.5/1
    GH = 5

    KH = 0 (because no CO3 is added)

    for fert I'm using
    KNO3, KH2PO4, MgSO4 with a ratio 1/0.1/0.1 for macro

    Element trace mix for micro

    water column is
    NO3 5ppm
    PO4 0.5ppm
    Fe 0.1ppm

    Lighting = 7h with Tropical led 48w 4480 lumens for 129L (33G)

    Plant : only Eleocharis sp mini

    Rock : Dragon stone

    basic layer : volcano JBL + ADA bacter 100 + JBL volcano mineral
    inbetween layer : mix of Volcano JBL + ADA amazonia normal
    to layer : only ADA amazonia light powder

    I started yesterday so I started slowly

    My questions are :

    1) do I have to add K2CO3 to increase KH with ADA aquasoil ?
    because my pH is very very low (< 6) to reach CO3 25ppm
    is it possible to add K2CO3 up to KH=3 with ADA aquasoil ?
    I know the aquasoil will take up the CO3-- and decreasy my KH continuously (and degrates aquasoil)
    but how do you do to have pH 6.5 with ADA aquasoil ?

    2) do I have to add K2SO4 or is it enough with K form KNO3 and KH2PO4 ?
    I supposed it will depend on the aquarium and the plants but usually, do you add it for eleocharis sp mini and how much ?

    3) for lighting, is it enough or too much 7h ? I want to avoid algaes at the biginning so I started slowly

    thanks a lot for your answers !
     
    #1 Coasters13, Jul 25, 2017
    Last edited: Jul 25, 2017
  2. Christophe

    Christophe Subscriber
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    Either K2CO3 or KHCO3 would be great ways to increase KH. If you add enough to bring the KH up to 2 or 3, that also adds enough potassium so that you won't really need K2SO4.

    Aquasoil might tend to reduce KH at least initially, but as it ages that effect will reduce. Don't worry too much about it, just be consistent with the KH of your water the same way every change, and things will level out over time

    You could even start at 6 hours and that would be OK, but 7 is not bad, depends some on the intensity of the light. If you begin to have problems, back off on the duration and intensity.
     
  3. Coasters13

    Coasters13 Member

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    Thanks a lot for your answer Christohe !

    very precise and helpfull

    I have an other question :

    I was used to use Flipper to diffuse CO2 in my aquarium (pressure 1.4 bars to have 1 bps)

    now I switched for a ceramic CO2 diffuser 3 in 1 from tropica

    I'm at 2.1 bars and I don't see any bubles (or very very few after 2 days) !!!

    is it enough, should I increase my pressure (up to wich value) or should I change my ceramic diffuser ?

    thanks
     
  4. Coasters13

    Coasters13 Member

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    I put 2.3 bats and its ok non!
     
  5. Christophe

    Christophe Subscriber
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    I think most diffusers begin to think about working at 2.5 to 3 bar. Glad you found it!
     
  6. rajkm

    rajkm Article Editor
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    KH I run at 1 -1.5 dKH. That's gen more than enough for me. You only need high KH for very specific plants.
    Lights you can run 7-8 hours but start at low-med lights and increase slowly over months. If you see algae on glass, back off.
     
  7. Coasters13

    Coasters13 Member

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    Hi all,

    I did some research and I found something that answer my question !


    I read the Article of Tom Barr on the analysis of ADA fertilizer Brighty Series

    And He found that "Bright K" is in fact just potassium (no NO3, no NH4, no PO4 and no Fe)

    Also, with the dose recommendation Tom found that the dosage is 3,4ppm of K per day


    After that, I read the ADA article on Brighty K

    they sayd this :

    Supplying potassium and keeping water buffering capacity
    Brighty K is a liquid fertilizer supplying potassium to planted aquarium
    Brighty K also has an effect of enhancing the buffering capacity of water
    and prevents a decline in pH of aquarium water
    usage : up to 2 months after initial set-up
    I have also read that brighty K is alcaline, must be used when the tap water is very soft
    and brighty K enhance the KH

    this mean that "Brighty K" is in fact K2CO3 in solution

    After some calculation
    if ADA sayd that we have to add 3.4ppm of K every day
    this mean that they also add 2.7ppm of CO3 every day
    this increase the KH by 0.15 points every day during up to 2 months

    so my question was : can I add K2CO3 to increasy my KH with ADA aquasoil

    the answer is yes, up to 0.25gr of K2CO3 for 10 G or 40L daily

    (+ CO3 coming from water change with tap water)
     
    P.Isley and snarkingturtle like this.
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