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Filter Bacteria
March 17, 2011
10:06 pm
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poshsouthernbird
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February 11, 2011
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Hi - I've been reading Hokum's thread (http://www.seriouslyfish.com/f.....topic=3351) about the filter being inadvertently turned off. Now I've always been led to believe that filter bacteria need a constant supply of fresh water flowing over them otherwise they start to die. I don't doubt this but what I am interested in is how long the bacteria can survive without a constant flow of water. From reading other forums the answer seems to be something between a few minutes and several hours so does anyone have any more definitive information?

Eyrie's comment about the bacteria going dormant is interesting, I've not heard about this before?

Would be interested in hearing your thoughts /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />

Cheers, S

www.injaf.org
April 11, 2011
9:54 am
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JazzBora150
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from my past experience with koi the filter could not be turned off for more than 1 hr for maintenance as the bacteria started to die
this was always the rule of thumb maybe it did err on the side of caution

my pennies worth

April 11, 2011
1:59 pm
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Hokum
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August 11, 2010
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QUOTE (poshsouthernbird @ Mar 17 2011, 10:49 PM) < {POST_SNAPBACK}>
Hi - I've been reading Hokum's thread (http://www.seriouslyfish.com/f.....topic=3351) about the filter being inadvertently turned off. Now I've always been led to believe that filter bacteria need a constant supply of fresh water flowing over them otherwise they start to die. I don't doubt this but what I am interested in is how long the bacteria can survive without a constant flow of water. From reading other forums the answer seems to be something between a few minutes and several hours so does anyone have any more definitive information?

Eyrie's comment about the bacteria going dormant is interesting, I've not heard about this before?

Would be interested in hearing your thoughts /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />

Cheers, S

Luckily I didn't have any issues. So it all depends on your setup. My tank is only about 50% stocked which probably helped.

April 12, 2011
11:24 am
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Bluedave
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June 28, 2008
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Does the flow of water across the filter not oxygenate the water for the bacteria?

Therefore the bacteria will start to die when the oxygen runs out? So size of filter (i.e. how much oxygenated water it can hold) etc. will affect the amount of time before the bacteria begins to die. It won't all die at once as well, so you may have a partial die back that depending on how hevily stocked you are, you might not notice?

Only guessing! I've had a filter off for about 10 hours before with no water quality issues (did carry out a big water change straight away though and maintained a small water change every day for a few days after).

April 12, 2011
6:42 pm
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Eyrie
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March 21, 2008
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My understanding is that the bacteria need oxygen primarily to reduce ammonia and nitrIte rather than for respiration, hence the dormant stage. Some time since I last looked at this though.

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