King Island Reservoir, Tasmania

A Sound Solution for Platypus Habitat: King Island Reservoir, Tasmania
Improving water quality and supporting biodiversity with EnviroSonic

The King Island Reservoir at Grassy, Tasmania, is a narrow 750-metre-long water body that serves as the primary water supply for the island. It is also home to a significant population of platypus.

In 2012, three EnviroSonic ES300 ultrasonic units were installed across two solar-powered pontoons to address recurring blue-green algae (cyanobacteria) blooms. Each unit emits targeted ultrasonic frequencies that disrupt the buoyancy of algae cells, preventing their proliferation without the use of chemicals.

Prior to installation, there was concern about the potential impact of Envirosonic frequencies on the platypus, a species highly sensitive to underwater vibrations. However, post-installation monitoring and local observations have indicated no adverse effects. On the contrary, the operator of King Island Rambles, which runs wildlife tours in the area, reported a noticeable improvement in water clarity and quality. They noted that the system has contributed to "a far healthier environment for the platypus," with their tours experiencing "record numbers of platypus sightings" in the years since deployment.

This case highlights EnviroSonic’s ability to deliver environmentally responsible algae control while supporting local ecosystems and biodiversity.