Lets play spot the deficiency;)

Discussion in 'Plant Problems' started by philfarm, Jun 15, 2013.

  1. philfarm
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    philfarm Algae harvester

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    Hi,

    about two weeks ago I stopped all dosing so that I could introduce some sensitive fish into non primordial soup conditions and have started slowly upping the dose since. I thought it might be interesting to see how severe the effects are in the fast growers...

    So who can tell me specifically what deficiencies are present? (CO2 is above 30ppm)


    [​IMG]
     
  2. tyronegenade
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    tyronegenade Specialist

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    We need a bigger picture to look at the veins of the leaves. Of the top of my head I would say magnesium, iron or nitrogen. The new lemna minor leaves also look pale... My bet is on nitrogen because magnesium and iron or mobil nutrients which the plant can move from old to young leaves.
     
  3. wolf
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    wolf Valued Contributor

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    I would say NO3
     
  4. Sir Bob Roberts
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    Sir Bob Roberts Green fingers

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    is that duckweed in there? i believe duckweed pulls nutrients really fast aswell
     
  5. Maurice
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    Maurice Aquascaper

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    +1
     
  6. Luis Embalo
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    Luis Embalo Valued Contributor

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    Discoloration... I would say iron and nitrogen..
     
  7. philfarm
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    philfarm Algae harvester

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    Re: Re: Lets play spot the deficiency;)

    Thats exacly why I initially had it in the tank, for stabilizing conditions after setup.... but now its a b!@ch to completly eradicate from the tank although there is such a small amount I'm sure its effects are marginal.

    The iron is a definate but the NO3 is strange becauae I've continued to feed the fish quite well and wasnt specifically dosing it even before I stoped the ferts... Is it possible its always been an underlying deficiency thats been somehow masked by the other ferts?


    Oh and I'm dosing DSD.

    Thanks
     
  8. Luis Embalo
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    Luis Embalo Valued Contributor

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    :) if you got duckweed in the tank, it will suck a lot of nutrients from the plants.. Dose more, much more.. :)

    I base my observation on experience and this picture:
    [​IMG]
     
  9. Luis Embalo
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    Luis Embalo Valued Contributor

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  10. shihr
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    shihr Administrator Staff Member

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    yep.. looks like Nitrate deficiency.. add more KNO3! :)
     
  11. philfarm
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    philfarm Algae harvester

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    Re: Lets play spot the deficiency;)

    Thanks guys but im not actually trying to fix the problem just understand whats going on out of interest...

    Anyway I've slowly upped my ferts to a 1/2 dose over the week (micros and K only)

    ... and the effects are wierd!


    [​IMG]

    The red is obviously coming from the sudden uptake of iron but whats strange is the stringy growth, the spacing of the Limno. leaves is like 30mm and the growth is eccessively fast... what could be causing this still the nitrate deficiency?

    Ive always dosed to the upper limits and then adjusted downward to find a stable equilibrium so its interesting to see the opposite in action..
     
    Last edited by a moderator: Apr 11, 2014
  12. tyronegenade
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    tyronegenade Specialist

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    The red/purple could be a response by the plant to protect the new leaves from the light... The long internode length is more of a mystery. Perhaps a by-product of the anthrocyanin synthesis are auxins? Or vice versa?

    But! Are you using Gro-lux tubes or a type of tube with a lot of far red light? Far red light causes stem elongation.
     
  13. Luis Embalo
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    Luis Embalo Valued Contributor

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    I have found that it can take up to two weeks to get results from a change..

    Also, old leaves do not regenerate.. so do a heavy trim and you should see some changes in two to three weeks.

    That is why I never try to find a balance, especially not with ferts, always give a lot.. :)
     
  14. Sir Bob Roberts
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    Sir Bob Roberts Green fingers

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    Re: Lets play spot the deficiency;)

    love the colouring thou
     
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  15. philfarm
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    philfarm Algae harvester

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    Re: Re: Lets play spot the deficiency;)

    Geez Professor Genade, you've stumped me there, please elaborate in idiot speak...

    Ive noticed a lot of plants will go pink towards the top of the tank but I dont think this coloration is the result of light overexposure namely because my light leans more toward the blue-ish end of the spectrum and the Limno. hasnt exhibited these effects before( maybe it could have been more vulnerable because of the deficiency?)


    With some plants but I have quite a few fast growers and they were starved of nutrients before this so I'm able to spot changes much faster. That is the same bunch of Limnophilia a few days later (after being topped and replanted) once I added the ferts the white growth started turning red the next day, weather this is from the ferts or light exposure I couldnt say..


    Definatly good advice(for plants) but with the addition of sensitive inhabitants I want to find the bottom limits of the primordial soup containers we call fishtanks..


    At the moment with a 1/2 dose of micros, k and no NO3 Im getting much healthier growth but its still growing too fast and consequently unneatly. From tomorrow I might start adding some nitrates if I dont start seeing a difference...
     
  16. tyronegenade
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    tyronegenade Specialist

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    Maybe the Limno is just naturally bleached at the top? I just googled it and found lots of pictures of plants with pale tops. The color could be a response to the light---to much UV in the spectrum? Also from the picks, internode length is pretty long normally. Maybe your plants were stunted before and this is why they had shorter internodes?

    I also find that plants get more red/colorful as they grow taller, towards the light. Too much light, not enough CO2 etc..? Perhaps just normal response to increasing light?
     

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