API E.M. Erythromycin Fish Remedy API® E.M. Erythromycin is a broad-spectrum fish medication formulated to help treat and control bacterial fish diseases in both freshwater and saltwater aquariums. It is suitable for common bacterial conditions such as body slime, mouth fungus, furunculosis, bacterial gill disease, and hemorrhagic septicemia. Product Benefits Helps treat broad-spectrum bacterial fish diseases Suitable for freshwater and saltwater aquariums Helps treat body slime and mouth fungus Supports treatment of furunculosis, including open lesions and swelling Helps treat bacterial gill disease Helps treat hemorrhagic septicemia, such as blood spots without visible skin damage Will not discolor aquarium water Can be used with API ich, fungus, or parasite remedies to help prevent secondary bacterial infection Suitable ForFreshwater and saltwater aquarium fish showing signs of bacterial infection. Available Sizes10 packets / 30 oz Usage ReminderUse according to the product label directions. For best results, complete the full recommended treatment course.