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2. Hypoxia in fish - Wikipedia

   en.wikipedia.org/wiki/Hypoxia_in_fish

   A fish's hypoxia tolerance can be represented in different ways. A commonly used representation is the critical O 2 tension (P crit), which is the lowest water O 2 tension (P O 2) at which a fish can maintain a stable O 2 consumption rate (M O 2). [2] A fish with a lower P crit is therefore thought to be more hypoxia-tolerant than a fish with a ...

3. Aquatic respiration - Wikipedia

   en.wikipedia.org/wiki/Aquatic_respiration

   In some fish, capillary blood flows in the opposite direction to the water, causing countercurrent exchange. The muscles on the sides of the pharynx push the oxygen-depleted water out the gill openings. In bony fish, the pumping of oxygen-poor water is aided by a bone that surrounds the gills called the operculum. [6]

4. Root effect - Wikipedia

   en.wikipedia.org/wiki/Root_Effect

   The Root effect is a physiological phenomenon that occurs in fish hemoglobin, named after its discoverer R. W. Root.It is the phenomenon where an increased proton or carbon dioxide concentration (lower pH) lowers hemoglobin's affinity and carrying capacity for oxygen.

5. Recirculating aquaculture system - Wikipedia

   en.wikipedia.org/wiki/Recirculating_aquaculture...

   Fish require oxygen to metabolize food and grow, as do bacteria communities in the biofilter. Dissolved oxygen levels can be increased through two methods, aeration and oxygenation . In aeration air is pumped through an air stone or similar device that creates small bubbles in the water column, this results in a high surface area where oxygen ...

6. Aquarium - Wikipedia

   en.wikipedia.org/wiki/Aquarium

   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.

7. 10 pretty tropical fish that could brighten up your aquarium

   www.aol.com/10-colorful-tropical-fish-could...

   Neon tetra info. Paracheirodon innesi Class: Actinopterygii Water: Fresh Diet: Omnivore Lifespan: Up to 5 years Neon tetras can live in a freshwater tropical aquarium, and their bright blue and ...