Why isnt vallis nana growing?

Discussion in 'Plant Help' started by aaronnorth, 8 Dec 2008.

  1. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire
    I have had it about 2months now i think - i got it from Mark, and it hasnt grown 1cm yet and i dont know why?

    60l tank
    2.7wpg / 36w PC T5
    pressurized CO2 - limeade drop checker
    fluval 205 (11x turnover - good circulation)
    5ml TPN+ daily.
    JBL aquabasis capped with sand.

    Anybody have any reasons why?

    Thanks.
     
  2. George Farmer

    George Farmer Founder Staff Member

    Messages:
    7,091
    Location:
    Cambridgeshire
    What KH/GH is your water?

    Are you dosing Excel/Easycarbo?
     
  3. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire
    kh - 8
    gh - 15
    ph - 7

    I dose 1 capful of excel after a waterchange every week - just to try and use the bottle up, so i doubt it is affecting it, although now i haen't dosed it for about a month.

    Thanks
     
  4. George Farmer

    George Farmer Founder Staff Member

    Messages:
    7,091
    Location:
    Cambridgeshire
    Then I'm stumped. Sorry.
     
  5. Mark Evans

    Mark Evans Expert

    Messages:
    6,492
    Location:
    newark notts.
    maybe, its a long shot and a guess but, it might be that might old tank parameters are completely different to your saaron. maybe its a shock for the plant and is re establishing its self.

    i had ph 6.5 and a kh 4/5 (i think)

    ive moved the same vallis from the same tank into another tank and it grew like mad again....same water conditions

    just a thought
     
  6. George Farmer

    George Farmer Founder Staff Member

    Messages:
    7,091
    Location:
    Cambridgeshire
    I thought that, as 100% aquatic plants like Vallisneria take longer to adapt - but 2 months should be enough time.
     
  7. altaaffe

    altaaffe Member

    Messages:
    309
    Location:
    Thornhill, Egremont, Cumbria
    I have to admit I experimented with some spare on my my wifes community tank and it is growing lush and strong- I have to really hack it back every week. The strange thing is - it is in pea gravel, no added ferts, no CO2, 1.2wpg, GH 3, KH 1, pH 7 but it is a heavily stocked tank. I have switched some shoots off to my Malawi tanks and those that don't get nibbled too heavily do well there too so I'm also at a loss for how it's not growing.
     
  8. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire
    Me too.

    I have never heard of vallis go through a period like this - if it was a crypt then i could understand... Strangely last November, i tried straight vallis, and that never grew ffor a few months either, although i put that down to my setup as it wasnt a planted tank at the time...
    Maybe it is just me?

    *sigh*

    Thanks anyway. :)
     
  9. howardish

    howardish Member

    Messages:
    63
    Location:
    Southend On Sea, Essex
    funny you bring this up. I had vallis nana up until about last week. It was in the tank from set up, high light, co2, ferts..the lot and it just didn't grow, everything else went mad, except that, which just kind of sat there, not dying, but not particularly growing. Then, after a few months it sent out runners everywhere, which soon overtook the growth of the original leaves very quickly.

    Strange :rolleyes:
     
  10. altaaffe

    altaaffe Member

    Messages:
    309
    Location:
    Thornhill, Egremont, Cumbria
    I am currently readind Diana Walstad's "Ecology of the Planted Aquarium" and a very good read I must say so far but she has been talking in the chapter I'm reading now about Allelopathy, where the plants are basically releasing chemicals into the water "for protection", some of these can affect other plants and have apparently been seen to even kill some plants.

    Wonder if you have another plant which could be affecting it. There is a quote in the book where they were not able to grow Vallis in a tank which contained a combo of Amazon sword, Anubias Nana, Limnophila and some crypts.
     
  11. beeky

    beeky Member

    Messages:
    879
    Location:
    Chippenham, Wiltshire
    The allelopathy theory has been around for a while, but I don't think there's any actual proof it exists in freshwater plants. It's just an idea thought up to explain why some plants don't grow well together.
     
  12. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire
    I too am sceptical about allelopathy, but while you mentioned it:

    hemanthious micranthemoides
    HC
    P.Helferi
    Microsorum pteropus narrow.
     
  13. altaaffe

    altaaffe Member

    Messages:
    309
    Location:
    Thornhill, Egremont, Cumbria
    I was sceptical when I started reading but the more I read, the more it's opening my mind to possibilities. They latest section I read was a clinical experiment involving eleocharis coloradensis that visibly prevented the growth of pondweeds, potamogeton nodosus and P. pectinatus. That's just one experiment, there are others in the chapter, so I for one am no longer sceptical.

    Although this may not be the reason for your problems here though Aaron

    Could it be something as simple as that combo is using up one nutrient too quickly for the vallis to be able to cope. I know with EI we're dosing extra but I've a tank I've added extra Ca to and the plants have come on quickly again. I was feeding the same dosing rates for EI on my main tank but things seemed to go backwards.
     
  14. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire
    I am going to give it another month, and if nothing happens, i will add some calcium sulphate, if there is still nothing happening, then I will use cryptocoryne balansae - although i was trying to stick with smaller leaved plants.

    Thanks everyone. :)
     
  15. altaaffe

    altaaffe Member

    Messages:
    309
    Location:
    Thornhill, Egremont, Cumbria
    To be honest Aaron, if you are in what I suspect is a hard water area, I doubt it would be that either. My water is kH 1, gH 3 out of the tap.
     

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