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2. Marine aquarium - Wikipedia

   en.wikipedia.org/wiki/Marine_aquarium

   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.

3. List of freshwater aquarium fish species - Wikipedia

   en.wikipedia.org/wiki/List_of_freshwater...

   Many color and tail pattern varieties exist. They generally need a ratio of 1 male to 2 females or more. All guppies and mollies are hardy fish that tolerate lower oxygen levels and temperatures than most aquarium fish, give birth to live young, and readily breed in home tanks. [58] can live in full sea water [59] 66 °F - 84 °F (19 °C - 29 °C)

4. Aquaponics - Wikipedia

   en.wikipedia.org/wiki/Aquaponics

   Aquaponics is a food production system that couples aquaculture (raising aquatic animals such as fish, crayfish, snails or prawns in tanks) with hydroponics (cultivating plants in water) whereby the nutrient-rich aquaculture water is fed to hydroponically grown plants.

5. Shedd Aquarium - Wikipedia

   en.wikipedia.org/wiki/Shedd_Aquarium

   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 .

6. History of underwater diving - Wikipedia

   en.wikipedia.org/wiki/History_of_underwater_diving

   Inspired by the simple apparatus of Maurice Fernez and the freedom it allowed the diver, he conceived an idea to make it free of the tube to the surface pump by using Michelin cylinders as the air supply, containing three litres (0.66 imp gal; 0.79 US gal) of air compressed to 150 kilograms per square centimetre (2,100 psi; 150 bar). The ...

7. Urban agriculture - Wikipedia

   en.wikipedia.org/wiki/Urban_agriculture

   In practice, fish are raised in a tank, and their waste releases ammonia. Beneficial bacteria then convert the ammonia into nitrites and nitrates, which serve as essential nutrients for the plants. As the plants take up these nutrients, they cleanse the water, which is recirculated back to the fish tank, completing the sustainable loop.