Nitrogen cycle

Nitrogen cycle

The nitrogen cycle describes how organic wastes break down in the aquarium. Fish wastes naturally decompose into ammonia, which is highly toxic. Nitrosomonas bacteria process the ammonia into nitrite, which is also toxic. Nitrobacter bacteria then break down the nitrite into nitrate, which is much less harmful. This is as far as the cycle goes in most tanks, though under the right conditions, the nitrate is further broken down to free nitrogen gas.

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Industry/Domain: Fishing
Category: Fish farming
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nitrogen cycle

Weather; Meteorology

A continuous series of natural processes by which nitrogen successively passes through air, soil, and organisms involving principally organism decay, nitrogen fixation, ...

nitrogen cycle

Biology; Bioclimatology

The process that allows nitrogen to move from the environment into living things and then go back into the environment.

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Plants; Plant pathology

The cycling of the element nitrogen from gaseous forms to various inorganic forms, such as ammonium, nitrates and nitrites, and organic forms, such as nucleic acids and proteins ...

nitrogen cycle

Chemistry; Weather; Atmospheric chemistry

Nitrogen cycling is an extremely important natural process, in which nitrogen-containing species such as ammonia, nitrate, and nitrite, are absorbed into the soil, atmosphere or ...

nitrogen cycle

Earth science; Soil science

The sequence of biochemical changes undergone by nitrogen wherein it is used by a living organism, transformed upon the death and decomposition of the organism, and converted ...

nitrogen cycle

Geography; Physical geography

Series of flows in an ecosystem which move nitrogen between various stores and allow it to perform functions essential for life. At its simplest level, nitrogen in the form of ...

bycatch

Fishing; Fish farming

Bycatch (or by-catch) is the portion of a fishing catch caught unintentionally in a fishery, in addition to the targeted catch, and discarded as unwanted or commercially unusable.

fishery

Fishing; Fish farming

The industry or occupation devoted to the catching, processing, or selling of fish, shellfish, or other aquatic animals.

biological filtration

Fishing; Fish farming

These filters make use of bacteria to break down wastes in the water into substances which are less toxic to the inhabitants, in a process known as the nitrogen cycle. Examples ...

biological reference points

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biomass

Fishing; Fish farming

Measure of the quantity, usually by weight in pounds or metric tons (2,205 pounds = 1 metric ton), of a stock at a given time.

brackish

Fishing; Fish farming

Water that part-way between freshwater and marine. A number of species prefer partly-salty water.

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