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  • Results 1 to 12 of 12

    Thread: How long do the nitrification bacteria live without water flow

    1. #1
      SimonW is offline Senior Member
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      How long do the nitrification bacteria live without water flow

      Hello friends:

      In the beginning of this summer we had a power outage for like 5 hours, and the biofilters (pressurized type) seemed to be OK despite that the water was not flowing through them therefore it might have been anaerobic for some time.

      So I wonder after how long time without water flowing through the filters I can regard the nitrification bacteria dead?

      Thanks!

      Simon

    2. #2
      batman's Avatar
      batman is online now Senior Member
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      We had 3 stock tanks of baby fish at 200 gallons each. 1 submerged canister filter and 2 external canisters. A power outage about the length you're talking about occured. When we came home and found the power out all the fish with the submerged filter were dead. The external filters were flushed and put back online. All fish OK. All filters were on the same cleaning schedule before outage. I think bio die off in a closed filter can happen fairly fast.
      The real Batman wears polyester! Don't be fooled by the plastic imposter.

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      kdh is offline Senior Member
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      several weeks

    4. #4
      pondfishguy is offline Senior Member
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      I’ve killed off the bacteria in numerous different types of systems for a variety of reasons over the years including pH crashes, overflowing with tapwater, cleaning with tapwater, power outages, taking filters out of service, sometimes emptying sometimes not..In my experience you really only kill some of the bacteria, my systems generally fully recover within 2 to 4 days.

    5. #5
      coolwon is offline Senior Member
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      Filters should be aerated at all times.
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      coolwon is offline Senior Member
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      Quote Originally Posted by pondfishguy View Post
      I’ve killed off the bacteria in numerous different types of systems for a variety of reasons over the years including pH crashes, overflowing with tapwater, cleaning with tapwater, power outages, taking filters out of service, sometimes emptying sometimes not..In my experience you really only kill some of the bacteria, my systems generally fully recover within 2 to 4 days.
      And in the meantime?
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    7. #7
      SimonW is offline Senior Member
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      Thanks all! You gave slightly different opinions I have to say.

      When I think after I realize that both sides may be correct, as once the bacteria have formed biofilm they become very resistant to all kinds of hazards. That means that the really matured biofilter can withstand harsh conditions, but newly established biofilter without a good amount of biofilm will probably die quickly.

    8. #8
      kdh is offline Senior Member
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      Quote Originally Posted by SimonW View Post
      Thanks all! You gave slightly different opinions I have to say.

      When I think after I realize that both sides may be correct, as once the bacteria have formed biofilm they become very resistant to all kinds of hazards. That means that the really matured biofilter can withstand harsh conditions, but newly established biofilter without a good amount of biofilm will probably die quickly.
      I dont see how a thicker bio film protects. As it comes down to having a food source to survive? There are many research papers that have tested how nitrifying bacteria survive and the ones I have read say several weeks without food is ok. I would imagine that there are other circumstances that would kill them off more quickly and some here have experienced this. Lack of oxygen ext.

    9. #9
      kdh is offline Senior Member
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      I would like to add that most of the nitrifying bacteria in your bio is not the nitrosomonas or nitrobacter strains we all want. So what dies off first are other ammonia oxidizing bacteria that are not as resilient as nitrosomonas/nitrobacter bacteria strains. Maybe this is why you see changes in parameters of your bio.
      Last edited by kdh; 07-30-2021 at 08:50 PM.

    10. #10
      Orlando is online now Senior Member
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      Back in 2017 this area was affected by a hurricane my area lost power around 8pm or so the weather wouldn't allow me to bring the generator outside till around 7:30 next morning, got it all set up and to make a long story short the system never had a hickup and by the way the bio chamber is not areated. So in my experience 12hrs was good others say weeks that gives me a piece of mind.

    11. #11
      pondfishguy is offline Senior Member
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      Quote Originally Posted by coolwon View Post
      And in the meantime?
      Stop feeding and use Safe

    12. #12
      coolwon is offline Senior Member
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      Quote Originally Posted by pondfishguy View Post
      Stop feeding and use Safe
      Most creatures need oxygen to survive for long.

      Except maybe anaerobic bacteria which have now formed in your densely populated bio filter, after the life supporting oxygen and food rich water is

      no longer available due to no water passing over their home the media.

      Safe takes care of the fishes needs.

      How do you evenly disperse Safe with no water flow?

      All depends on the duration.
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