Aquarium filters are critical components of both freshwater and marine aquaria. Aquarium filters remove physical and soluble chemical waste products from aquaria, simplifying maintenance. Furthermore, aquarium filters are necessary to support life as aquaria are relatively small, closed volumes of water compared to the natural environment of most fish.
Air-driven corner filter
A large shower biological filter designed to maximize the beneficial effects of the nitrogen cycle, in a koi pond
Sponges, plastic balls, ceramic tubes and gravel are all suitable for aquarium filtration
A commercially available canister filter
An aquarium is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aquatic reptiles, such as turtles, and aquatic plants. The term aquarium, coined by English naturalist Philip Henry Gosse, combines the Latin root aqua, meaning 'water', with the suffix -arium, meaning 'a place for relating to'.
The underwater tunnel in the London aquarium
A freshwater aquarium with plants and various tropical fish
Cat and fishbowl, after Isoda Koryusai. Original c. 1775.
Goldfish in a glass: portrait of Therese Krones, 1824
