The biological process in which bacteria convert ammoniaAmmonia A nitrogen-rich waste product produced by fish that is toxic in high concentrations. It is the starting point in the nitrogen cycle of an aquaponics system. to nitritesNitrites An intermediate form of nitrogen created in the aquaponics nitrogen cycle that needs further conversion to nitrates. and then to nitratesNitrates A form of nitrogen that is used as nutrients by plants in an aquaponic system, produced by the nitrogen cycle.
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