Invasive zebra mussels have been found living in an aquarium algae product called moss balls. (Photo: U.S. Fish and Wildlife Service).

Invasive zebra mussels have been found living in an aquarium algae product called moss balls. (Photo: U.S. Fish and Wildlife Service).

Moss balls: Aquarium algae product could contain zebra mussels

Red Deerians are asked to carefully dispose of it

The Alberta government is asking anyone who purchased an aquarium product called moss balls after Jan. 1 to destroy and dispose of it.

Live zebra mussels, an invasive species, have been discovered in moss (or marimo) balls, a spherical, plant-like algae commonly sold at pet and garden stores throughout North America, including in Alberta.

Albertans should destroy moss balls by freezing or boiling them, then placing them in a sealed plastic bag and disposing of them with their household trash.

Moss balls, as well as any water they were in, should not be flushed down the toilet, put down a drain or placed in a composter because of the danger that zebra mussels will end up in provincial waterways.

Aquarium owners are also being asked to inspect their aquariums when preforming regular maintenance, such as water changes, for any organisms that were not intentionally put into the tank.

Environment Minister Jason Nixon said, “Invasive mussels pose a serious threat to Alberta’s aquatic ecosystems and fisheries. They can cause millions of dollars in damage to water infrastructure, such as irrigation canals.”

It takes a team effort to keep Alberta largely free of zebra mussels, Nixon added. “While retailers and distributors across the province have been proactive in removing moss balls from store shelves, we are asking Albertans to take action to ensure zebra mussels are not inadvertently released into our environment.”

With shells measuring up to three centimetres, zebra mussels are difficult to spot – but their small size doesn’t stop them from being destructive. They can clog water intake pipes, disrupt natural food chains and affect recreation areas when dead shells wash up on shores. Zebra mussels multiply rapidly and are extremely difficult to eradicate once established.



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