H3D I'm sorry you are incorrect.
Bacteria die at approximately the same rate as they grew when food is scarce. So for Nitrobacter. sp. with an optimal growth time of 10 hours this will take one to several days or even up to several weeks in colder temps (Bio-spira).
Second due to most aquatic bacteria's slow growth rates the depletion of O2 in the stationary water is really quite slow. It can take more than a day to reach a completely anaerobic conditions. Also, as long as there is a unbroken water column exposed to air dissolved oxygen will diffuse into most areas. So the chances of obligate aerobes being without oxygen is very, very, low. Unless you have a canister filter that you turn the shutoff valves closed and leave shut for several days you not going to get completely anaerobic conditons.
Note that i said without food or oxygen.
Nowhere did i say that they would be without food or oxygen immediately.
After they chew through all available food and oxygen, they will begin to die, and as you said they die at roughly the same rate they grow. They have a doubling time of 6-8 hours in a warm tank, less in a cold one.
Try actually reading posts before you start trying to make yourself look cool.
Optimal growth time is the spead at which they organism grows as fast as they can in perfect conditions (can't speed it up). Not trying to make myself look cool, I just have a pet peeve against misleading and incorrect information. More than a few years as a microbiologist, a statistician, and a geneticist gives me a little bit of a background in the field.
Everything I posted was carefully researched, if you want the references please PM me.
Please, lets not take things to a personal level...state your opinion about the OPs questions, rebuttal as required and move on....
We all love our fishies...