Kordon Ich Attack is an easy to use treatment composed of 100% organic ingredients for al types of external and epidermal single-celled infections. It stops infections and external parasitic invasions and prevents many secondary infections. Ich Attack treats diseases caused by: Ich, Fungus, Protozoans, and Dinoflagellates. It will not harm eggs, plants, or reef aquariums and is safe for sensitive or scaleless fish such as loaches, catfish, and fry. This product is safe for freshwater, brackish, and saltwater applications. Treats up to 240 gallons.