Unique algae control by bacteria. Nutrient utilizing bacteria in a stable permanent form begin to work and multiply within shortest time upon contact with water. They remove algae nutrients - in particular phosphate - from the water and are therefore effective against undesired algae in the aquarium by using the nutrient competition principle. Algae growth is inhibited and the algae population is lastingly reduced. Algae blooms are prevented in case of prophylactic use.
For quick and easy filter media changes. Adding and removing filter media is considerably accelerated by the sera filter media bags. The filter media remain in place within the filter, and cleaning becomes easier. sera filter media bags are available in 2 sizes, and are optimally suited for all sera filter media.