Certain chemicals used for cleaning pools, spas, or fountains, especially those containing copper, can kill aquatic wildlife if improperly released into the environment. 

The best way to prevent copper pollution is to avoid using chemicals that contain copper! 

If you need to empty your pool, spa or fountain, test the water for copper. If copper is present, contact a local pool maintenance company to learn more about removal. In some cases, your local wastewater agency may require a permit.