Fraction 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.