sera Siporax algovec Professional with nutrient utilizing bacteria in a dormant form that start working and multiplying upon contact with aquarium water. The bacteria remove algae nutrients - in particular phosphate - from the water in a natural and biologically way 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 of sera Siporax algovec Professional.Dosage of sera Siporax algovec ProfessionalPlace 2 tabs per liter of aquarium water in the filter (represents 17g/50 l). The package content is sufficient for up to 600 litres of aquarium water. Filter net bag is included.