A bacterial culture which rapidly starts up the waste breakdown process in the filter. This process is essential for a healthy aquarium. Filter Start is A product of the latest advances in biotechnology. Manufactured using strict culture and quality control processes. A guaranteed pure culture of safe effective bacteria. Does not colour the aquarium water Harmless to all species of fish and plants Usage When maturing a new filter or media especially when filter foams are new or have been replaced When test kits show your filter is not working properly Once a month to ensure optimum filter function For use in Coldwater and Tropical Freshwater Aquariums. Contents 100ml Filter Start Pipette Measuring Cap Guide to Fish Health Treats 500 litres e.g. aquarium 5ft x 2ft x 2ft