Invasive Zebra Mussels Detected in Aquarium Moss Balls

Invasive Zebra Mussels Detected in Aquarium Moss Balls Retailers and Consumers Urged to Take Action to Prevent Spread The Wisconsin Department of Natural Resources (DNR) is urging Wisconsinites to immediately remove and properly dispose of commercially purchased “moss balls” for aquariums after invasive zebra mussels were discovered inside and on some of these products in Wisconsin and