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The major components are an aquarium, usually made from glass or acrylic, filtration equipment, lighting, and an aquarium heater. Marine aquariums can range in volume from less than 80 litres, (< 20 US gal) to over 1,200 litres (300 US gal). Small volumes are more difficult to maintain due to the more rapid changes in water chemistry.
A 1,200,000-litre (320,000 US gal; 260,000 imp gal) aquarium at Monterey Bay Aquarium in California, displaying a kelp forest ecosystem An aquarium can range from a small glass bowl containing less than 1 litre (2.1 US pt) of water to immense public aquaria that house entire ecosystems such as kelp forests .
An aquarium heater is a device used in the fishkeeping hobby to warm the temperature of water in aquariums. [ 1] Most tropical freshwater and marine aquariums are maintained at temperatures that range from 22 to 30 °C (72 to 86 °F). [ 1][ 2][ 3] The types include glass immersion heaters and undergravel heating.
An aquarium may have freshwater (salinity below 0.5 PPT) [clarification needed], simulating a lake or river environment; brackish water (a salt level of 0.5 to 30 PPT), simulating environments lying between fresh and salt, such as estuaries; and salt water or seawater (a salt level of 30 to 40 PPT), simulating an ocean or sea environment. Even ...
An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.
The New England Aquarium is a nonprofit organization located in Boston, ... a 200,000-US-gallon (760,000 L) cylindrical exhibit made of concrete and glass, opened in ...
Shedd Aquarium (formally the John G. Shedd Aquarium) is an indoor public aquarium in Chicago. Opened on May 30, 1930, the 5 million US gal (19,000,000 L; 4,200,000 imp gal) aquarium holds about 32,000 animals and is the third largest aquarium in the Western Hemisphere , after the Georgia Aquarium and Monterey Bay Aquarium .
The aquarium began in the mid-1970s when then-Mayor William Donald Schaefer, (1921–2011), and the Commissioner of the city Department of Housing and Community Development, Robert C. Embry, inspired by a visit to the two-decade old New England Aquarium on the waterfront of Boston, Massachusetts, conceived and championed the idea of an aquarium as a vital component of Baltimore's overall ...
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