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Is aquasoil ADA amazonia light powder pumping PO4 ?

Discussion in 'Sediment / Substrate' started by Coasters13, Jul 30, 2017.

  1. Coasters13

    Coasters13 Member

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    hi all,

    I have a question for you, if you have this king of experience

    here is the situation :

    I'm starting a new Tank with Eleocharis sp mini (10 boxes) in 129L (33G)

    I'm adding CO2, enough light (Led dennerle tropica 48w during 7h)

    and I'm adding dry fertilizer and I have an issue with PO4

    I'm adding 1,3ppm of KH2PO4 3 times/weeks, I check with a standard solution if the concentration in my tank is ok (and it's ok : 1,3ppm)

    48 hours after, I check again the PO4 in my tank and there is nothing in my tank, PO4 is = 0 ...

    My tank is new and Eleocharis is small

    is it possible that all the plants pump the PO4 in 48h ?

    or is it my ADA aquasoil amazonia light powder which is pumping my PO4 ?

    I did it 3 times and all the 3 time my PO4 fell from 1ppm to 0ppm in 48hours

    I ask this question because I'm worry to saturate my soil with PO4 if it's pumping in it

    thanks for your help !



    20170726_205730.jpg
     
  2. Coasters13

    Coasters13 Member

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    NEED HELP please !

    I have a huge issue with my PO4 in my aquarium

    my eleocharis is dying, I dose dose dose and my PO4 is still and always @ 0 ppm

    I chose Amazonia light powder because I read that it's better to reduce algae issue

    did I do a mistake by taking Amazonia light ?

    I wonder if Amazonia light is right for carpeting plant like eleocharis

    I would may be took Amazonia "classic" wich is higher in nutriment.

    I'm dosing KH2PO4 1.5 ppm every day !!!

    I dose 0.75 the morning, I check the ppm with my test kit and it's ok but at the end of the day my concentration is @ 0 ppm

    same thing the night ! I dose 0.75ppm the evening and the morning it's @ 0 ppm !!!

    how is it possible to have a water column between 1 and 3ppm of PO4 ??

    should I increase more my PO4 ? 1.5ppm per day is high

    ADA brighty light is dosing 0.2ppm of PO4 per day how is it possible to grow eleocharis with such low concentration ?

    do you have some advice for my ? should I add more PO4 ?

    thanks for your help
     
  3. Coasters13

    Coasters13 Member

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  4. Christophe

    Christophe Subscriber

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    With fairly fresh Aquasoil, you shouldn't really need to dose much at all for perhaps a couple months. I'd suspect your test kit is wonky, it's very unlikely that little bit of plant biomass is actually consuming that much PO4.

    It takes some time for plants to establish, and the waiting is the hardest part. Chasing specific numbers with a wonky test kit makes it feel worse.

    Keep up your water changes, probably twice a week if it's in the first couple months of an Aquasoil tank. If you dose ferts, keep the doses to recommended EI level or even perhaps less. Watch things for a while.
     
  5. Coasters13

    Coasters13 Member

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    Thanks Christophe,

    I'm not sure that my test kit is wrong

    because when I add 0.75 ppm of PO4 in my aquarium

    If I check the concentration 10 minutes after the addition in my aquarium, my test kit shows concentration around 0.75 ppm (I always confirm the results with a standard solution made by myself @1ppm)

    but if a wait 12hours and make again the PO4 test in my aquarium, I have 0 ppm.

    your are right when you write that with aquasoil I don't need to fert for a couple of month but if I don't do that eleocharis is dying

    since I dose twice a day PO4 (morning 0.75 ppm and evening 0.75ppm) roots are coming again and eleocharis is growing again

    that's my surprise and this is why I share it with you

    I can't understand how it's possible and I don't understand what happens and where is going my PO4 ...
     
  6. Coasters13

    Coasters13 Member

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    Tonight I'll do a test

    I'll use 3 glasses

    one with RO water + amazonia light (controle 1)

    one with 1ppm PO4 + amazonia light (experiment)

    one with only solution PO4 1ppm (controle 2)

    I'll do the PO4 thest to shows the concentration immediatly

    and I'll wait 12h.

    I'll see if amazonia light release or pump or do nothing with my PO4
     
  7. rajkm

    rajkm Lifetime Members
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    Don't worry about PO4 dropping, even if the soil is taking some out, or its precipitating by reacting with something, in the end it's available in the substrate for plants to access.
    Concentrate on your CO2 and flow.
    There will be some dieback from the plants adjusting to being submerged.
    As long as the conditions are good, you will see it bounce back. It might already be sending runners but you won't see it for some time.
     
  8. Coasters13

    Coasters13 Member

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    20170809_200220.jpg 20170809_200253.jpg 20170810_133034.jpg

    I have the answer of my question : yes amazonia light is pumping my PO4 !!!

    Here are the results:
    Picture one :
    1 : ro water + amazonia light
    2 : standard solution PO4 1ppm + amazonia light
    3 : standard solution PO4 1ppm
    Picture taken few minutes after mixing
    It seems that PO4 is already pumping by amazonia light but the solution is still trouble.

    Picture 2 : zoom of sample 2 and 3 from picture 1

    Picture 3 : after one night

    Amazonia light has pump all the PO4 !!!
     

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