Fungus Eliminator (Crystal) Clears Serious Fungus & Bacteria Fast,"An effective anti-protozoan, antibacterial treatment that is highly effective against a wide variety of diseases including fungus, grey slime, dropsy open sores, bloody spots and streaks, fin and tail rot, cloudy eyes and swim bladder disease.","Before using, change 25% of the water; remove activated carbon during use. Second dose may be added in  four days after a 25% water change. Can be used full-strength even on catfish. Not recommended for use on crustaceans. ",2.5 oz. (70 g),1 tsp./5 U.S. gal. (5 g/20 L),75 U.S. gal. (280 L)