sera Siporax bio active Professional with nutrient utilizing bacteria in a staple dormant form that start working and multiplying upon contact with aquarium water. Sera Siporax bio active Professional combines stabilizing biological filtration with effective and quick pollutant removal of water conditioning. Pollutant utilizing bacteria remove pollutants such as ammonium and nitrite from the water already shortly after the first contact with water. Sludge is decomposed faster, and thus a critical pollutant reservoir is quickly rendered harmless. The biological equilibrium is stabilized and maintenance intervals become longer.Dosage of sera Siporax bio active ProfessionalPlace 3 tabs per liter of aquarium water in the filter (represents 26g/50 l). The package content is sufficient for up to 400 litres of aquarium water. Filter net bag is included.