The contained particles promote the activeness of microorganisms, which feed on nitrate and break it down biologicallyFor better water qualityFor all freshwater and marine aquariums100 ml for 400 litres of aquarium water250 ml for 1,000 litres of aquarium waterDosageShake well ...The contained particles promote the activeness of microorganisms, which feed on nitrate and break it down biologicallyFor better water qualityFor all freshwater and marine aquariums100 ml for 400 litres of aquarium water250 ml for 1,000 litres of aquarium waterDosageShake well before use. Add 2.5 ml per 10 l of aquarium water weekly. The visible particles will spread out and sink slowly