Melafix All natural anti-bacterial remedy For fresh and saltwater aquariums. Mefafix will not harm the biological filter orcolor the water. MelaFix uses the anti-bacterial power of Melaleuca (the name for a variety of Tea Tree) for the treatment of bacterial infections in fresh and saltwater fish. The healing properties of Tea Tree extract have been known for centuries, and are now available for treating aquarium fish. MelaFix is so unique, that after more than six years of research and development, it was granted a patent. MelaFix rapidly heals wounds and damaged fins,Tissue regrowth can often be seen within four days of treatment. MelaFix can be used with all fresh- and saltwater fish, reef aquariums containing invertebrates, and with live aquarium plants. MelaFix does not harm the biological filter, color the water or change the PH. Directions for Use: - Remove any activated carbon from the filter - Add 5ml (1 tsp) per 38 litres of aquarium water - Dose daily for 7 days - After 7 days make a 25% water change