A complete and concentrated conditioner for both fresh and saltwater. Use when establishing your aquarium and at every water change. This versatile water conditioner can be used in both fresh and saltwater aquariums. It removes chlorine, chloramine and ammonia from tap water, and detoxifies nitrite and nitrate. It also promotes the production and regeneration of the natural slime coat of fish. Use Prime when setting up your aquarium, and whenever adding or changing water. I found prime to be very easy to use. Just add a capful per the directions. One capful treats 50 gallons. It does a good job keeping the water clear. If the water starts getting cloudy between changes, I add some addition when adding water to the tank. It seems to help.