Seen Any Didymo aka Rock Snot?

What is Didymo or Rock Snot? Didymo is an invasive microscopic algae (diatom) that produces nuisance growths in freshwater rivers and streams.

What Can I Do to Help Prevent the Spread of Didymo? Click here to find out.

Facts about how Didymo became Rock Snot

hat produces nuisance growths in freshwater rivers and streams with consistently cold water temperatures and low nutrient levels