ALEXANDRIA, Minn. (WCCO) — The DNR may have a new weapon against an invasive species that’s threatening Minnesota lakes.

Zebra mussels suck up Zequanox, as they think the solution is food.

But in actuality, Zequanox is dead bacteria cells that kill the mussels.

So far it has worked to keep pipes mussel-free. That’s why the DNR wants to know if it could work in a lake.

Beginning Friday, the DNR will test Carlos State Park in Alexandria, Minn.