Freshwater fish medication. - It is a remedy for white spot disease, tail swelling, and water mold disease. - Can be used for freshwater fish except ancient fish and large catfish. Malachite green oxalate: 50 mg, purified water: appropriate amount - Add 10mL of this product to 100L of breeding water. The water will turn blue, but this color will disappear within 2-3 days. After 2-3 days later, if disease will not recover, please change the water and e-administrate. * This product is a fish disease medicine. * Do not use it for any purpose other than its intended purpose. * Do not use for ancient fish (arowana, etc.), large catfish and saltwater fish. * Do not use for freshly planted aquatic plants and red aquatic plants. * Do not use in aquariums equipped with UV (ultraviolet) sterilizers. * If activated carbon, zeolite, etc. are used for the filter medium, remove them before use.