Fraction from Continuum Aquatics is a technologically advanced, premium quality, maximum strength water conditioner that makes tap water immediately safe for freshwater or marine aquarium use. It is also the premium product for use directly in a freshwater or marine aquarium to remove toxic ammonia, nitrites or nitrates. It will immediately remove over dosages of iodine or potassium permanganate based products in the aquarium as well as over dosages of medicinal dyes. It is safe for all marine or freshwater species including sensitive fish, live corals and other invertebrates and live plants. Fraction contains no slime coat enhancers as these could pollute the aquarium. Proper control of toxic ammonia is imperative for the health of your aquarium inhabitants. Fraction is not meant to be used continuously to control ammonia in the aquarium, or to make up for poor maintenance, but as an emergency measure to get the ammonia under control until a properly working biological filter can be established. In cases where overcrowding has occurred, Fraction will control ammonia levels until the bacterial filter can catch up. To help restore a non-functioning bacterial filter, use Continuum BacterGen M or BacterGen F depending on type of aquarium. ml treats 200 litres This bottle will treat 9500 Litres (2500 US Gallons)