https://www.selleckchem.com/pr....oducts/bsj-4-116.htm
Copper is frequently used as an algicide, and copper ion generators such as the Aquascape IonGen claim to be safe for use in systems containing fish. In 2012, a die-off of koi ( ) in a pond in Raleigh, North Carolina, occurred after the IonGen was added to the system. Physical and postmortem examinations suggested that heavy metal toxicity was the likely cause of morbidity and mortality. This was supported by a heavy metal screening of the owners' pond. Additional experiments were performed to determine if the IonGen produced toxic le
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