Nitrifying bacteria death and decay
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    Registered User Karlt's Avatar
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    Nitrifying bacteria death and decay

    http://cobweb.ecn.purdue.edu/~allema...-behavior.html

    Scroll down to death and decay - interesting methinks.
    Ancient Curmudgeon

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    Mods n Rockers Curly's Avatar
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    Quote Originally Posted by Karlt View Post
    http://cobweb.ecn.purdue.edu/~allema...-behavior.html

    Scroll down to death and decay - interesting methinks.
    interesting indeed.

    i've not read the whole article, only the death and decay part as directed, but i've book marked it for future reading.

    so they seem to think that you will loose about 1-2% of the bacteria per day if they do not have food and oxygen.

    which makes sense, as in basic terms, if part of the colony dies then it breaks down into the colonies food source, which means the part that died feeds the rest of the colony.
    The only way to go on is to go on. To say "I can do this" even when you know you can't.


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    Solipsist Eyrie's Avatar
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    Thanks for the link - bookmarked here as well.
    Mature, sensible signature required for responsible position. Good prospects for the right candidate. Apply within.

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    M. altispinosa SarahLee's Avatar
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    Ditto

    I read it at work this afternoon.
    Very good read and actually far more interesting than trying to determine whether a leasing agreement was a finance lease or operating lease under IFRS
    Sarah

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    Solipsist Eyrie's Avatar
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    Quote Originally Posted by SarahLee View Post
    ... determine whether a leasing agreement was a finance lease or operating lease under IFRS
    Professional sympathies.
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    Live, Laugh, Love ❤ Trillian's Avatar
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    Right, my eyes glazed over as soon as I clicked on the link. Too many years of reading scientific papers just made me allergic. Synopsis in plain English please.
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    Been here a long time kingborris's Avatar
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    i may be missing it, but it doesnt seem to alude as to what may trigger the resting state of these nitrifying bacteria? is this lack of food, oxygen or both?

    interesting read though, and one i'll digest more when i havent had a skin full
    KB :-)


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    Registered User charles101's Avatar
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    Quote Originally Posted by kingborris View Post
    interesting read though, and one i'll digest more when i havent had a skin full
    same!i think i will leave this one till tomorrow.although very fascinating of course it sounds,but will have to have a look tomorrow
    120L community. (soon to be anyway)
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    Registered User Karlt's Avatar
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    Quote Originally Posted by Trillian View Post
    Right, my eyes glazed over as soon as I clicked on the link. Too many years of reading scientific papers just made me allergic. Synopsis in plain English please.
    1. Nitrifying bacteria do not die quickly when their food and oxygen supplies are cut off (since the process is one of oxidation, losing either the food or the oxygen is pretty much the same thing). Instead they go dormant.

    2. There is a slow die-off, at around 1-2% per day.
    Ancient Curmudgeon

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    Super Moderator billcstf40's Avatar
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    Talking

    fascinating reading in practical terms it means that old filter media, should be able to recuperate better than any of us have considered.
    Thanks Karl
    Bill
    Illegitimatus non Carborundum; "A friend who cannot at a pinch remember a thing or two that never happened is as bad as one who does not know how to forget." "Quis custodiet ipsos custodes?" "Pardon him. Theodotus: he is a barbarian, and thinks that the customs of his tribe and island are the laws of nature." George Bernard Shaw

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    M. altispinosa SarahLee's Avatar
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    Quote Originally Posted by Eyrie View Post
    Professional sympathies.
    Thanks Mark - not one of my best afternoons at work. Especially since the contract for the sale and leaseback deal printed off at around 50 pages!


    The only other thing I would have liked to see in that paper is the impact of low temperatures on nitrifiers (thinking in the context of ponds)

    Enough must survive even at Winter temperatures to deal with the reduced bio-load of the inactive fish. Presumably their metabolic activity declines to such an extent that they become almost dormant at the lowest temperature levels - I would have liked to see that expanded on though.
    Sarah

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    to destruction & beyond ! davethetester's Avatar
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    I was interested to read that the optimal acidity is mid pH 7 to mid pH 8 ...... so in soft water areas such as Mark's or Sarah's are their filters less efficient ?

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    Registered User Karlt's Avatar
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    If it's accompanied by low pH, yes.
    Ancient Curmudgeon

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    Solipsist Eyrie's Avatar
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    I knew there was a problem if the pH hit 5.5, but hadn't thought about effectiveness declining before then.

    I presume that my tanks, being run at a pH of 6.6, must contain more bacteria to compensate for this inefficiency.
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    to destruction & beyond ! davethetester's Avatar
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    It'd be nice to have it quantified

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