TetraAqua Bactozym ensures the rapid development of naturally occuring filter bacteria. If used when setting up an aquarium, Bactozym allows a few fish to be added after only 24 hours. Bactozym causes enzymatic degradation of organic matter to improve the quality and clarity of the water. Bactozym can also be used to prevent the serious loss of filter bacteria during water changes and filter maintainence. Revitalises the filter after the use of medications. Bactozym is suitable for use in both freshwater and marine aquariums.