Eco-clear Scrubber will help remove attached dead organic debris from waterfalls , streams and rocks in seconds. Use the maintenance dosage of Eco-Clear Scrubber once a week to keep your waterfalls and streams looking pristine. Eco-Clear Scrubber will also keep fountain intakes clean and remove unsightly dead debris from the perimeter of any size pond. Safe for use with fish, plants, birds or domestic animals that drink from the pond.