Seachem MetroPlex is a potent supplement designed to treat parasitic and viral infections in saltwater aquariums. It contains metronidazole as its active ingredient, making it highly effective against various pathogenic organisms that can harm your marine life. When using this product, ensure all sensitive invertebrates are removed from the tank and that UV filters, ozone filters, and chemical filtration media such as MatrixCarbon and Purigen are disabled to prevent interference with the treatment.