Review on Seachem MetroPlex Metronidazole - Effective Treatment for Parasites and Bacteria in Saltwater and Freshwater Aquariums by Chinelo Aranjo

I used this as a first aid for my fish. When I added new fish to my aquarium. I've never had any issues with its safety. I use garlic and seachem binder to feed it to my fish as I can imagine it's not very palatable to my fish, but using garlic and waiting to be fed during the day helps them absorb it wolf down. I've also used it on sick fish over the years and it works great.