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The nitrogen cycle in aquaponics involves the conversion of fish waste into nitrates that plants use as nutrients, through the action of bacteria.

A solids filter removes particulate matter such as fish waste and uneaten food from the water, keeping the aquaponics system clean and reducing the load on the biofilter.

A biofilter in an aquaponics system provides a place for nitrifying bacteria to live and convert ammonia into nitrates, thus filtering the water for the fish.

Nitrates (NO3-) are the final product of the nitrogen cycle in aquaponics, and serve as a key nutrient that plants absorb to grow.

Maintaining proper pH levels (typically between 6.8 and 7.2) in an aquaponics system is critical for the health of both fish and plants and the effectiveness of bacteria.

Ammonia (NH3) is excreted by fish and is the starting point of the nitrogen cycle in aquaponics; toxic at high levels but converted by bacteria.

Aquaponic media are inert materials like gravel, expanded clay pellets, or lava rock used in grow beds to support plant roots and promote bacterial colonization.

Hydroponics is the practice of growing plants in water without soil, providing nutrients directly in the water; it is one of the two main components of aquaponics.

System cycling is the process of establishing a balanced nitrogen cycle in a new aquaponics system, often involving adding a source of ammonia to promote bacterial growth.

Flood and drain (also known as ebb and flow) is an aquaponics method where water periodically floods the grow beds and then drains back, providing nutrients and oxygen to the plants.

Nitrites (NO2-) are the intermediate product in the nitrogen cycle, formed from ammonia and then converted into nitrates by nitrifying bacteria.

In aquaponics, plant nutrients are supplied by fish wastes, which are converted into usable forms by bacteria, ensuring that plants can grow without the need for additional fertilizers.

A bell siphon is a device used in flood and drain aquaponic systems to regulate the water level in the grow bed, ensuring plants get nutrients and oxygen.

The fish tank in an aquaponics system houses the fish, whose waste provides nutrients for the plants grown in the grow beds.

A grow bed in aquaponics is where plants are cultivated, usually filled with a medium like gravel or clay pellets to support plant roots and bacteria colonization.

Aquaponics is a sustainable farming method that combines aquaculture (raising fish) and hydroponics (growing plants in water) in a symbiotic environment.

Nitrifying bacteria are essential in the nitrogen cycle, converting ammonia from fish waste to nitrites and then to nitrates, which are used by plants.

Polyculture in aquaponics refers to growing a variety of plants together, which can enhance system stability and increase biodiversity.

Aquaculture is the farming of fish, crustaceans, molluscs, aquatic plants, and other aquatic organisms. It's combined with hydroponics in aquaponics systems for nutrient supply.