Multiple choice general knowledge

What is "Cycling" in aquarium terms?

  1. Growth of bacterial in the intial few weeks after aquarium setup

  2. Periodically cleaning the aquarium

  3. Changing the fish often

  4. Changing the water often
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Option A is correct. In aquarium terminology, 'cycling' refers to establishing the nitrogen cycle - the growth of beneficial bacteria (nitrosomonas and nitrobacter) in the filter during the initial weeks after setup. These bacteria convert toxic ammonia to nitrite and then to less harmful nitrate.

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