JBL BioNitrat Ex is the easiest method for the reliable biological removal of nitrate in fresh and marine water aquariums. JBL BioNitrat Ex consists of filter balls, which are made of bioplastics, which serve as an ideal food source for nitratedegrading bacteria. That means that denitrifying bacteria preferably settle on this material to break it down. During this process the bacteria remove the nitrate from the aquarium. At the same time this stabilises the carbonate hardness and the pH value.JBL BioNitrat Ex+ reduces algae nutrients by means of nitrate removal+ reduces the number of water changes+ serves as nutrient for nitrate-degrading bacteria+ simple application+ purely biological+ for freshwater and marine water suitableApplication of JBL BioNitrat ExDosage: 1 filter ball for 2-3 litres of aqaurium water. The package content (100 filter balls) is sufficient for approx. 200-300 litres of aquarium water. Just place the filter balls as last stage in your external filter. After appr