Blue Planet Tri Sulfa Tablets are a broad-spectrum, fast-dissolving medication for freshwater and saltwater aquarium fish, designed to treat White Spot (Ich), mouth/body fungus (Columnaris), and fin/tail rot. The treatment is suitable for external bacterial infections and should be used by dissolving one tablet per 40L of water. Key Details and Usage: Active Ingredients: Contains 153.5mg153.5 mg 153.5mg Sulfadiazine, 154.7mg154.7 mg 154.7mg Sulfadiamidine, and 154.1mg154.1 mg 154.1mg Sulfamerazine (as monosodium salts) per tablet. Dosage: 1 tablet per 40L40 L 40L of aquarium water. Severe Infections: 1 tablet per 20L20 L 20L of water . Application: Pre-dissolve tablets in a cup before adding to the tank. Treatment Duration: Repeat after 3 days if necessary. Precautions: Remove activated carbon from the filter during treatment. Do not use on fish intended for human consumption.