Broad spectrum antibiotic for the treatment of diseases in ornamental fresh and saltwater aquarium fish caused by tetracycline sensitive bacteria. Each tablet contains: 375mg Tetracycline Hydrochloride. Equivalent to 346mg/Kg of Tetracycline. Directions for use: Remove activated carbon or other absorbent material from filtration system and slow flow rate of sub gravel filtration for the duration of the treatment. Prolonged treatments may affect the helpful bacterial flora in biological filters. Use of an isolated treatment tanks as hospital tank for the affected fishes is recommended, ensure the water is as similar as possible to the main aquarium (pH, temperature, salinity, ect), aerate vigorously during treatment. NOT TO BE USED ON FISH INTENDED FOR HUMAN CONSUMPTION. Dose Rate: Use at the rate of 1 tablet per 20 liters of aquarium water. If condition does not improve consult your veterinarian or aquarium dealer. Replace aquarium water after succesfull treatment.