Waterlife Bacterlife is a concentrated biological additive containing selective natural bacteria necessary for establishing and maintaining biological action responsible for cleaning water naturally in aquariums and ponds. Biological action eliminates the build-up of organic wastes i.e. fish faeces and untreated food as well as ammonia and nitrites. Bacterlife can also help reduce the formation of algae by competing for nutrients used by algae for their growth. Suitable for seawater, tropical freshwater and coldwater aquaria. - Cleans water naturally. - Creates intensive biological activity. - Restores biological action. - Rapidly starts filters. - Removes ammonia and nitrite. Also available in 125ml, 500ml 1 Litre bottles.