Fritz FixIck is a revolutionary new way to treat aquatic external parasites including Ick, Chilodonella, Trichodina and Tetrahymena. As one of the most common diseases most aquarists will encounter, finding an Ick treatment that is simple, safe, and highly effective can be difficult. Fritz FickIck does not contain formaldehyde, a common active in many ick treatments. Formaldehyde will cause damage to gills and internal organs, which can result in additional stress and fish loss. One of the active ingredients in Fritz FixIck is Gentian Violet, which gives it a recognizable purple hue. This compound is much gentler than malachite green based treatments. Also improving on previous treatments, Fritz FixIck has been shown to be effective at killing Ick parasites with a simple 2-dose system, with no reinfection after one week. Due to Fritz FixIcks additional antibacterial and anti-fungal properties, secondary infections were also prevented with no additional medications, resulting in even higher recovery rates. 8oz. Bottle will treat 480 gallons.