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The nitrogen cycle in an aquarium. Fishless cycling takes place over a period of several weeks, during which the aquarist provides an ammonia source for the development of the nitrifying bacterial colony. Nitrifying bacteria in the aquarium grow on all surfaces, but particularly in areas of high water flow and high surface area such as the filter.
A large shower biological filter designed to maximize the beneficial effects of the nitrogen cycle, in a koi pond. Proper management of the nitrogen cycle is a vital element of a successful aquarium. Excretia and other decomposing organic matter produce ammonia which is highly toxic to fish.
The nitrogen cycle in an aquarium is only a portion of the complete cycle: nitrogen must be added to the system (usually through food provided to the tank inhabitants), and nitrates accumulate in the water at the end of the process, or become bound in the biomass of plants.
The nitrogen cycle in an aquarium Fish are animals and generate waste as they metabolize food, which aquarists must manage. Fish, invertebrates, fungi , and some bacteria excrete nitrogen in the form of ammonia (which converts to ammonium in acidic water) and must then pass through the nitrogen cycle .
Cycling refers to establishing bacterial colonies that regulate the nitrogen cycle, the conversion of ammonia to nitrite and finally to nitrate. There are two means of cycling a tank: Fish-in cycling whereby the fish produce waste and are the key ammonia source for the cycle and fishless cycling whereby liquid ammonia solution or decaying fish ...
Larger (approximately 200 US gallons (760 L)) aquariums are much more stable and water changes may not need to take place if the nitrogen cycle has fully established itself in the tank, although this is a controversial statement among aquarists. Water changes are used to maintain balance of calcium, carbonate alkalinity, and magnesium which are ...
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes.
English: Nitrogen Cycle in aquariums. Legend: (1) Addition of food and nutrients, (2) Production of Urea and Ammonia by Fish, (3) Ammonia is converted to Nitrites by beneficial Nitrosomonas bacteria, (4) Nitrites are converted to Nitrates by beneficial Nitrospira bacteria.