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The nitrogen cycle in an aquarium. Fishless cycling takes place over a period of several weeks, during which the aquarist provides an ammonia source for the development of the nitrifying bacterial colony. Nitrifying bacteria in the aquarium grow on all surfaces, but particularly in areas of high water flow and high surface area such as the filter.
That is, large fish need large tanks and small fish can do well in smaller tanks. Lastly, the tank can become overcrowded without being overstocked. In other words, the aquarium can be suitable with regard to filtration capacity, oxygen load, and water, yet still be so crowded that the inhabitants are uncomfortable.
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.
These fish are best kept with live or frozen feed and they easily outgrow the tank within eight to ten months. An aquarium with the minimum diameter of 6 by 3.5 feet (1.8 by 1.1 m) and 300 US gallons (1,100 L; 250 imp gal) is suggested as a bare minimum but 400–800 US gallons (1,500–3,000 L; 330–670 imp gal) is the best way to go. [ 9 ]
Also a freshwater and brackish water fish and often sold as Dragon Fish or Dragon Goby: 21" Wheeler's watchman goby: Amblyeleotris wheeleri: Yes: 8 cm (3.1 in) Yellow watchman goby: Cryptocentrus cinctus: Yes: A species of "watchman" or "shrimp" goby that can form a symbiotic relationship with pistol shrimp: 7 cm (2.8 in) Yasha goby ...
Once circulated water reaches the surface, the air-water interface facilitates the transfer of oxygen to the lake water. Natural resource and environmental managers have long been challenged by problems caused by thermal stratification of lakes. [2] [10] Fish die-offs have been directly associated with thermal gradients, stagnation, and ice ...
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