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2. Red garra - Wikipedia

   en.wikipedia.org/wiki/Red_garra

   Doctor fish cleaning a bather's feet Some spas provide large fish ponds with thousands of doctor fish in them Doctor fish facilities at spa resorts exist in many countries worldwide. In 2006, doctor fish spa resorts opened in Kangal , Turkey, Hakone , Japan, and Umag , Croatia, where the fish are used to clean the bathers at the spa.

3. Water supply and sanitation in Jordan - Wikipedia

   en.wikipedia.org/wiki/Water_supply_and...

   However, water supply is intermittent and it is common to store water in rooftop tanks. The level of water lost through leakage, underregistration, and theft in municipal water supply (non-revenue water) is approximately 51%. [8] Water tariffs are subsidized. A National Water Strategy, adopted in 2009, emphasizes desalination and wastewater reuse.

4. Cleaning symbiosis - Wikipedia

   en.wikipedia.org/wiki/Cleaning_symbiosis

   Cleaning symbiosis is a relationship between a pair of animals of different species, involving the removal and subsequent ingestion of ectoparasites, diseased and injured tissue, and unwanted food items from the surface of the host organism (the client) by the cleaning organism (the cleaner). [5]

5. Freshwater aquarium - Wikipedia

   en.wikipedia.org/wiki/Freshwater_aquarium

   According to this method, fish waste could be consumed by plants, and plants along with the air surface of the water could supply oxygen for the fish. [3] In 1869, the first tropical fish (the Paradise Fish) was imported from Asia. In these days, tropical tanks were kept warm by an open flame.

6. Clean Water Act - Wikipedia

   en.wikipedia.org/wiki/Clean_Water_Act

   "Clean Water Act Jurisdictional Handbook." Environmental Law Institute (2nd ed., 2012) NYT Investigation: Corporations Violated Clean Water Act Over 500,000 Times in Last Five Years (2009-09-14) - video report by Democracy Now! Works related to Clean Water Act at Wikisource; EPA programs. Clean Water State Revolving Fund; Total Maximum Daily ...

7. Organisms involved in water purification - Wikipedia

   en.wikipedia.org/wiki/Organisms_involved_in...

   Rotifers are microscopic complex organisms and are filter feeders removing fine particulate matter from water. They occur naturally in aerobic lagoons, activated sludge processes, in trickling filters and in final settlement tanks and are a significant factor in removing suspended bacterial cells and algae from the water column. [6] [7]