Supratect is must have for all aquarium owners. Tested by hobbyists around the world to fight Fungal infections with as little as 1 dose and Ick with as little as 5-7 doses Safe for use in all aquariums, no harm to biological filtration, aquatic plants, coral, shrimp or other inverts Works in both Freshwater and Saltwater but requires higher dose in Saltwater Excellent for keeping new fish eggs free of fungus Very easy to use with easy to read instructions right on the bottle Although QT is the best bet using Supratect when adding new fish will greatly reduce risk of ick and fungal infections in a freshwater tank Can be used with water changes to help maintain optimal health of fish