Interpet Anti Ulcer is a 2 dose treatment, and a unique patented formulation which treats fish that are suffering from systemic bacterial infections. Aeromonas,Pseudomonas and Vibrio bacteria can quickly overcome fish causing the classic symptoms of: Ulcer sores on the body of the fish - this is the most common symptom. Dropsy - where the fish\'s scales stick out like apinecone - or the belly of the fish can become hollow as the fish becomes emaciated. Pop eye - where fishes eyes swell and stick out. Bacterial gill disease - which will cause the fish to breathe very rapidly. In very acute cases the fish may die before showing any obvious external symptoms. Available in 3 sizes: - treats 2,273 litres (500 gallons)