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Thread: What Is Mulm?

  1. #1
    csmith Guest

    What Is Mulm?

    Is the red gunk in my filter mulm? I've never exactly known what "mulm" is, but here I have this red/orange..stuff that covers my filter pads and the filter internals from top to bottom between water changes. It almost looks like earwax. I never got this accumulation until I set up the Eheim Liberty filter.

  2. #2
    Join Date
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    Talking Lives In Canada!

    Hi,

    Mulm is also called detritus the fish wastes and organic materials that have not decomposed.

    Also, Detritus Mulm, lives in Canada.

    As good as any definition, a bit prejudiced. http://theaquariumwiki.com/Mulm, http://theaquariumwiki.com/Detritus, http://mulm.org/.

    It may be that this filter and/or pump is just doing a better job.

    Biollante
    The first sign we don't know what we are doing is an obsession with numbers. - Johann Wolfgang von Goethe

    Disclaimer: I am not trying to make you mad, it is just what I am, an evil plant monster, 'nuf said.

    • I believe the information I am giving is sound, I am not a veterinarian, professional chemist or particularly bright and certainly not a "Guru.".
    • I assume you are of legal age, competent and it is legal for you to acquire, possess and use any materials or perform any action in your in your jurisdiction.
    • When in doubt "don't."

  3. #3
    Quote Originally Posted by Biollante View Post
    Hi,

    Mulm is also called detritus the fish wastes and organic materials that have not decomposed.

    Also, Detritus Mulm, lives in Canada.

    As good as any definition, a bit prejudiced. http://theaquariumwiki.com/Mulm, http://theaquariumwiki.com/Detritus, http://mulm.org/.

    It may be that this filter and/or pump is just doing a better job.

    Biollante
    I wondered if you'd take the bait.

    You Evil Plant Monster.

  4. #4
    Join Date
    Jun 2009
    Location
    Surprise, AZ
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    Cool Evil Is As Evil Does!

    However could I resist!

    Biollante
    The first sign we don't know what we are doing is an obsession with numbers. - Johann Wolfgang von Goethe

    Disclaimer: I am not trying to make you mad, it is just what I am, an evil plant monster, 'nuf said.

    • I believe the information I am giving is sound, I am not a veterinarian, professional chemist or particularly bright and certainly not a "Guru.".
    • I assume you are of legal age, competent and it is legal for you to acquire, possess and use any materials or perform any action in your in your jurisdiction.
    • When in doubt "don't."

  5. #5
    It seems the iron we add make the mulm (in the filter) look redder too.
    Last edited by nipat; 04-25-2010 at 12:45 PM. Reason: (in the filter)

  6. #6
    Looks like "mulm" is not bad for planted aquariums or is it?
    "Ich Hatte Einen Kameraden"

    "In the Shadow of Hermes"

  7. #7
    Brian20 Guest
    well detritus not is bad if it is in the substrate where roots and bacteria can proccess it. In the filter it will have a lot of bacteria. If it not caused problem to you by now it is safe. I think it depends on the quantity, a lot of mulm can affect negatively if bacteria cant proccess all.

  8. #8
    Join Date
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    Talking Cuts Down On Detritus Mulm While Feeding Baby Fish

    Hi All,

    The detritus of aquarium life is a debated topic.

    I like to think of myself as the sort that does not care should a little mulm pile up; after all, it provides a home for infusorians that feed or baby fish and various generally helpful bacteria. But I find myself vacuuming the stuff up more often than not.

    I maintain a number of tanks from my pre-enriched substrate days that use deep sand beds (DSB) as substrates that also serve along with the plants as my primary filtration. The mulm is the secret ingredient and why some assume my inert sand and silt are enriched (well they are, just not the way folks usually think).

    The enriched substrates, as well as very mature DSB rarely allow much build up of mulm, one of the reasons I am such a fan of worm poop and kitty litter substrates, an inch or two of enriched substrates mimics many of the desirable elements of mature deep sand beds without the wait. (The downside is the need for external filtering.)

    Biollante
    Last edited by Biollante; 04-26-2010 at 02:15 AM. Reason: DSB not DBS
    The first sign we don't know what we are doing is an obsession with numbers. - Johann Wolfgang von Goethe

    Disclaimer: I am not trying to make you mad, it is just what I am, an evil plant monster, 'nuf said.

    • I believe the information I am giving is sound, I am not a veterinarian, professional chemist or particularly bright and certainly not a "Guru.".
    • I assume you are of legal age, competent and it is legal for you to acquire, possess and use any materials or perform any action in your in your jurisdiction.
    • When in doubt "don't."

  9. #9
    Join Date
    Sep 2005
    Location
    Burlington, NC
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    2,510

    Wink

    Quote Originally Posted by csmith View Post
    Is the red gunk in my filter mulm? ... I never got this accumulation until I set up the Eheim Liberty filter.
    Quote Originally Posted by Biollante View Post
    ... It may be that this filter and/or pump is just doing a better job.

    Biollante
    You like that Liberty filter don't you?

  10. #10
    Join Date
    Sep 2005
    Location
    Burlington, NC
    Posts
    2,510
    Quote Originally Posted by Biollante View Post
    ... http://theaquariumwiki.com/ ...

    Biollante
    I didn't know about the aqW website.

    Thanks a bunch!!!!

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