Amazon sword

Discussion in 'Plant Help' started by Themuleous, 30 Sep 2007.

  1. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    Hi all

    Got an issue with my swords, the leaves aren't right. Any bright ideas? EC substrate, with 30ppm CO2, lighting 36w Arcadia freshwater, tank 24 USg. I also try and give it a dose of AE trace once a week but it might not have had it for a bit. Nothing else added. I dont know the water stats as gave up testing ages ago. I could just need to up the trace addition. Certainly looks like a fert deficiency, iron or magnesium? The other plants are doing ok. Been a while since Ive kept amazon swords so a bit out of touch with their needs.

    Swordleaf.jpg

    Thanks :)

    Sam
     

    Attached Files:

  2. Matt Holbrook-Bull

    Matt Holbrook-Bull Founder

    Messages:
    963
    Location:
    Dorset, UK
    Again, I suspect Nitrogen deficiency. Try putting root tabs in around the swords, they need far more feed than they can really pull in via the water column.
     
  3. James Flexton

    James Flexton Member

    Messages:
    358
    Location:
    Stotfold, Herts/Beds
    maybe but he has ecocomplete substrate so i wouldassume from that it's a water column thing. are you not adding macro's at all? even though it's relativly low light with the co2 in there they will be growing faster than you expect. i'd add potassium nitrate if i were you. i have seen my swords do that when i've been lazy with my dry powder dosing in the past.

    if you have them to hand do EI and root tabs. as ceg4048 wold say...double everything. :D
     
  4. Matt Holbrook-Bull

    Matt Holbrook-Bull Founder

    Messages:
    963
    Location:
    Dorset, UK
    hmms.. true that.. but its possible that the substrate has been exhausted. If EI is being added, then id say thats definatly the case. IMO, 'built in' substrate ferts only really last about 3-6 months.. the same as a terrestrial compost, wed feed heavily after that time on things like hanging baskets etc, which in principle, are very similar to planted tanks as theyre also a closed system.
     
  5. beeky

    beeky Member

    Messages:
    879
    Location:
    Chippenham, Wiltshire
    It begs the question, why pay exhorbitant prices for specialist substrates if they only last 6 months? I thought EC and AS pulled in nutrients from the water column and 'trapped' them in the substrate for use by the roots. Is that not the case?
     
  6. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    Thanks for all the advice :) I'm not doing EI as its a low light tank. I will test the NO3 this even and see what the deal is. No3 has never been a problem in the past because of the high fish load but you're right Jim, the CO2 could mean they are sucking more out of the water. I have noticed after the prune that the new leaves on the H.poly are distorted so thats another clue for the N deficiency.

    Guess it cant hurt to add some more NO3!

    Sam
     

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