Case Studies

Quagga mussels eradicated from lake with low doses of ionic copper

This report describes the use of the acid-stabilized ionic copper formulation called EarthTec QZ to treat an entire lake heavily infested with quagga mussels for the purpose of eradicating the invasive species. This is the first recorded instance of a lake-wide eradication effort of quagga mussels and is also the largest and deepest lake known to have been the subject of an effort to completely eradicate either quagga or zebra mussels.

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New Zealand mud snails eradicated from Arizona fish hatchery

New Zealand mud snails have successfully been eradicated from Arizona’s largest fish hatchery dedicated to the production of rainbow and brown trout. Fish mortality rates were within normal operational levels at a low dose of EarthTec QZ. Without an effective treatment, complete eradication of the fish stock and sanitation of the hatchery would have been the only alternative, representing a major monetary loss for the state of Arizona.

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USGS studies zebra mussel control with ionic copper

The USGS is studying zebra mussel control in Lake Minnetonka, Minnesota. The project is a collaboration with the University of Minnesota Aquatic Invasive Species Research Center. If successful, the treatment could provide a blueprint for protecting other lakes infested with zebra mussels.

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Copper ion generator cons outweigh pros

An independent study for the Bureau of Reclamation found that unexpected electrical problems and rapid deterioration of anodes compromised a copper ion generator under real world conditions. As a result, the installation significantly underperformed expectations set by the manufacturer’s manual.

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