Cascade Koi & Aquatics have been selling Waterlife treatments for many years. Myxazin can be used in coldwater tropical freshwater and marine fish only systems. Myxazin can be used for the treatment of fin rot, body rot, ulcers, cloudy eyes, pop eye, raised veins 'redness' and other symptoms of bacterial infections. Myxazin can also be used when introducing new fish to your aquarium to help reduce the risks of disease. Myxazin is safe to use with fish, plants and filters.