Substrate

Discussion in 'ID Needed' started by Warr7207, 8 Mar 2008.

  1. Warr7207

    Warr7207

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    Any idea why this part of my tank's substrate has gone black/grey ?

    [​IMG]
     
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  3. Rory

    Rory Admin MASA Contributor

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    Dead snail maybe?
     
  4. Warr7207

    Warr7207 Thread Starter

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    If a snail died would the shell be left behind ?

    I poked the substrate and there is definitely no shell. I also thought it could be a snail as I have burrowing units.
     
  5. Alfie

    Alfie

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    Warr, just a thought. There seems to be air bubbles in your subtrate, if it is it could be bacteria growth.
     
  6. Galibore

    Galibore Retired Moderator

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    Warr,

    I think it may just be an anoxic area.
     
  7. Warr7207

    Warr7207 Thread Starter

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    There is bubbles, is this bad ?


    Anoxic, please explain, good,bad ugly etc?
     
  8. Alfie

    Alfie

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    Anoxic refers to an oxygen depleted area. This also occurs naturally in the ocean.

    The bubbles normally occur when you add the water after the substate is in place. They become starved of oxygen and then they can feed bacteria like cyano.
     
  9. Alfie

    Alfie

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  10. Warr7207

    Warr7207 Thread Starter

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    May have been when I aquascaped. Should I leave it or try get rid of it ?
     
  11. Warr7207

    Warr7207 Thread Starter

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  12. Alfie

    Alfie

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    Not as drastic. I would take something and slowly turn the area of sand to let out the bubbles.
     
  13. Mekaeel

    Mekaeel Moderator MASA Contributor

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    also got a patch in my DSB.not doing any harm to the system though.by the way it is about 5cm from the top layer
     
  14. Galibore

    Galibore Retired Moderator

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    Warr, I'm not sure if it's harmful. I have lots of it but have never bothered with it.
     
  15. SIMS

    SIMS

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    yea I also have quite a bit in my one tank...
     
  16. jacquesb

    jacquesb Retired Moderator

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    Hi Warr - what you are seeing is most likely the result of your DSB actually working. As being said - the area have most likely gone anoxic. Meaning that the oxygen in that area have now been depleted, and the an-aerobic bacteria is now turning the nitrates into nitrogen gas an hydrogen gas. The same goes for the bubbles in your DSB.
    The blackness could most likely be hydrogen sulfide that you are seeing. This should NOT be released into the water, as it IS toxic to the life in your tank.

    Here's a few links on this for your info:
    NitrateNNR

    http://www.wetwebmedia.com/dsbfaq2.htm


     
    Last edited: 9 Mar 2008
  17. Warr7207

    Warr7207 Thread Starter

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    Jacques I have to ask where are you going with this link above.

    Quote:"Lab fires don’t happen as often as you might think, at least to hear the way organic chemists talk. We all have alarming stories of alarming reactions (often set up by some rather alarming labmates), but these things are harvested over a fairly broad range of experience. It’s a familiar enough topic that I can remember someone sitting down at lunch while we were swapping lab stories and saying “Oh, this conversation. . .”" :whistling:
     
  18. jacquesb

    jacquesb Retired Moderator

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    Sorry - Warr - :blushing: Me -> :1:

    I need a HOLIDAY... been a tough week - AND getting old - me eyes not as good as it used to be... :)

    No to be serious - was a slight mistakes.... to quick to copy... :)
     
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