... disease,crustaceans ulcers, edema, enteritis, red legs, black gill and so on.2. Crabs: crustacean ulcers, trembling disease, yellow head, black ... necrosis, enteritis.3. Frogs: gastroenteritis, red legs disease, flatulence and so on.Usage and Dosage:1. Oral administration: every 20kg feed ... , twice a day, continue 3-5 days2. External use: per 667 cubic meters use the drug 100ml for prevention, every15-20 ...