For this product we require a completed Drug & Chemical Affidavit on file. If you have not submitted this form to us, please click here, and fax (813-671-8237) or email (fishsupplies@verizon.net) back to us. Thank You. Our special formulation of Nitrofurazone, Furazolidone, Methylene Blue and sodium chloride. USE: Anti- microbial, anti- protozoan, anti-bacterial, anti-fungal. Wide spectrum. Good for newly arrived fish in quarantine situations. Also good for healing wounds and ammonia burn on newly arriving fish. Widely used for shipping or packing water. Works well for sores on fish in Koi ponds. DOSAGE: 1/4 teaspoon per 20 gallons every 24 hours with a 25% water change before each treatment. Treat for 10 days. For ponds: 1/4 teaspoon per 20 gallons, once a week for two weeks. *50 Grams will treat 625 gallons one time Info from Natiaonal Fsih