For aquarium water to suit both fish and plants: to biologically activate filters, setting up aquariums, for water changes and for re-establishing bacteria after fish diseases. For freshwater and marine aquariums, turtle and shrimp tanks For the use of new filters, after filter cleaning and the use of medication For a fast biological filter settling: breakdown of ammonium/ammonia and nitrite through highly active living bacteria Sufficient for 3 l filter material Contents: 1 pack Filterstart, 10 ml. Use: 10 ml/3 l filter material