This is a fish disease treatment revolution. Use Ultra Cure PX to treat internal parasites infections in all fish. Formulated with metranidazole, flubenol and praziquantel, PX takes care of intestinal worms, flagellates, and a number of other unwelcome internal guests. PX helps to prevent secondary infection outbreaks while enticing sick fish to eat with special pheromones. Safe for both freshwater and saltwater fish.