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2. Water aeration - Wikipedia

   en.wikipedia.org/wiki/Water_aeration

   Oxygen can be driven into the water when the wind disturbs the surface of the water body and natural aeration can also occur through a movement of water caused by an incoming stream, waterfall, or even a strong flood. In large water bodies in temperate climates, autumn turn-over can introduce oxygen rich water into the oxygen-poor hypolimnion.

3. Distilled water - Wikipedia

   en.wikipedia.org/wiki/Distilled_water

   Water escaping as steam, for example from a boiler of heating system or steam engine, leaves behind any dissolved materials leading to mineral deposits known as boiler scale. A boiling water distiller. Boiling tank on top and holding tank on the bottom. Low-volume humidifiers such as cigar humidors can use distilled water to avoid mineral ...

4. Aquarium granuloma - Wikipedia

   en.wikipedia.org/wiki/Aquarium_granuloma

   Hence, this infection is commonly seen in individuals who clean fish tanks, handle ornamental fish and work in wet fields. [ 2 ] Aquatic systems with a high density of fish and warm waters appear to be conditions particularly favorable to this infectious agent, and increase the chances to contract fish tank granuloma.

5. Cleaner fish - Wikipedia

   en.wikipedia.org/wiki/Cleaner_fish

   Brackish water refers to aquatic environments that have a salinity in between salt and fresh water systems. Cleaning symbiosis has also been observed in these areas between two brackish water cichlids of the genus Etroplus from South Asia.

6. Water chlorination - Wikipedia

   en.wikipedia.org/wiki/Water_chlorination

   As a halogen, chlorine is a highly efficient disinfectant, and is added to public water supplies to kill disease-causing pathogens, such as bacteria, viruses, and protozoans, that commonly grow in water supply reservoirs, on the walls of water mains and in storage tanks. [16]

7. Rainwater tank - Wikipedia

   en.wikipedia.org/wiki/Rainwater_tank

   Maintenance includes checking roofs and rain gutters for vegetation and debris, maintaining screens around the tank, and occasionally desludging (removing sediment by draining and cleaning the tank of algae and other contaminants). Rainwater tanks which are not properly sealed (secured at the top) may act as breeding grounds for mosquitoes. [7]