Unwanted freshwater pests like the invasive catfish and algae didymo pose a serious threat to our rivers, streams and lakes. Once in a waterway these pets can spread rapidly and destroy the environmental, recreational and aesthetic values of our waterways.

Freshwater pests like salvinia can quickly form extensive mats, completely smothering waterways and badly affecting water quality. It can double in area within 10 days. The mats kill off native plants, attract breeding mosquitoes, block dams and irrigation systems, remove oxygen from the water and create a drowning risk for people and animals.

Some freshwater pests are microscopic and can be spread by a single drop of water or a single fish egg. Even very small fragments of many aquatic plants can easily take root and grow into new plants.

Even if you can’t see the danger you could be spreading it. Pests that seem safely contained in a pond can be easily spread elsewhere by birds, pond overflows, earthworks machinery or if they’re shared with neighbours and friends.