Optimises the filter performance and prolongs the intervals between filter cleaning. For setting-up new aquariums and after water changes and fish diseases for freshwater/marine aquariums, turtle and shrimp tanks Put the granulate into the pre-filter or the first filter stage of your internal or external filter Sludge breakdown by pure bacteria cultures. No clogging of filter materials. The filter needs cleaning less often Bacteria activated granulate: sufficient for 5 - 6 l filter volume Contents: 1 pack FilterBoost, 25 ml. Use: 25 g/5 - 6 l filter volume