Mituri si realitate

Elucidarea mitului:

   "All nitrifying bacteria need a well oxygenated environment or nitrification will cease. Ideally the oxygen level needs to be above 3 mg/l (most fish need a dissolved oxygen level of 6 or 7 mg/l). If the environment is totally devoid of oxygen the bacteria will eventually die. The time an aquarium filter can be left off varies with temp. At cooler temps the metabolism of the bacteria slows down and so they will last longer. It also depends on the dissolved oxygen level of the water when the filter was turned off and whether the filters taps were closed or left open. Nitrifying bacteria will all die in the absence of dissolved oxygen after 24 hrs but it will take several hours to reach this point (longer at cooler temps) so if a filter has been turned off for a day or so it is worth restarting it and letting the remaining bacteria recover. Even if 90% have died filter bacteria will double their numbers every 24 hrs. Slow by bacteria standards but even with just 5% left the filter would recover in just 6 days."

Restul articolului despre bacteriile nitrificatoare de unde am citat, il puteti citi aici!