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Algae-Munching Fish Clean Up Chinese Lake

Algae is often hailed as the next great biofuel resource, but the pond scum can multiply enough to threaten water supplies when left to its own devices.

algae bloom China's 900-square-mile Taihu Lake, in the east near Shanghai, is covered in polluting blue-green algae blooms, which are mainly caused by untreated sewage (which contains high concentrations of nitrogen). Combined with industrial waste, the blooms post a major threat to Taihu's status as a water source for the nearby city of Wuxi (population: 2.3 million). And despite a multi-million dollar investment in sewage pipes, Taihu's water remains a problem.

The solution? 10 million algae-eating fish. Chinese officials plan on releasing green and silver carp into the Taihu as part of a massive clean-up effort. Even though the 10 million fish will only clean up one-tenth of Taihu's massive area, it's a huge step for one of China's most scenic lakes.

The country has used algae-eating fish to clean Taihu and other lakes before. The fish, which include Black Molly, Plecos, and Siamese Algae Eaters, are also often used by fish enthusiasts to clean freshwater aquariums.

Via PhysOrg

See related post: China Tries Command-and-Control To Save Water, End Drought

Add New Comment


  • Gustaf Redemo

    what happens when organisms are taken out of one and put into a new biotope?

  • Bhaskar M V


    We would like to offer a much simpler and better solution to removing Blue Green Algae from polluted lakes.

    Nualgi is a micronutrient that causes growth of Diatom Algae and these are consumed by Zooplankton and these by Fish.

    Our website is

    best regards