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For example, a 190-litre (42 imp gal; 50 US gal) aquarium with an external filter that holds 40 litres (8.8 imp gal; 11 US gal) creates a 230-litre (51 imp gal; 61 US gal) aquatic system, an increase of over twenty percent. A variety of nutrient cycles is important in the aquarium.
A freshwater aquarium is a receptacle that holds one or more freshwater aquatic organisms for decorative, pet-keeping, or research purposes. Modern aquariums are most often made from transparent glass or acrylic glass. Typical inhabitants include fish, plants, amphibians, and invertebrates, such as snails and crustaceans. Tropical freshwater ...
The most common type of saltwater fish tank, the tropical marine tank, houses marine animals from tropical climates. Usually kept between 24 and 28 °C (75 and 82 °F), these tanks include tropical reef tanks, as well as fish-only tanks. These tanks tend to have a low concentration of microscopic plankton and other foods eaten by filter feeders.
For example, the death of the only fish in an 11-litre (3 US gal; 2 imp gal) tank causes dramatic changes in the system, while the death of that same fish in a 400-litre (110 US gal; 88 imp gal) tank with many other fish in it represents only a minor change. For this reason, hobbyists often favor larger tanks, as they require less attention.
Ideally, the water pump should push 10x the volume of the tank or pond plus an extra 100lph or gph. Goldfish will die without sufficient dissolved oxygen in the water. A filter that can do at least 10x filtration is best, which means that for every 10 gallons or liters of water, the filter should be able to cycle 100 gallons or liters per hour.
The million-gallon Open Sea community exhibit contains a school of Pacific sardines that, in 2011, numbered 14,000 individuals. [17] Holding 1.2 million US gallons (4,500,000 L), the Open Sea community exhibit is the aquarium's largest tank. [s] Made of fiberglass-reinforced plastic, it is 80 feet (24 m) long [18] and 35 feet (11 m) deep. Its ...
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