API Freshwater Aquarium Salt in the 50-ld box helps fish to recover from disease and regain their health. Your aquarium will benefit greatly from the all-natural results this product provides. Features: Promotes fish health and disease recovery with increased electrolytes Improves respiration for fish in freshwater aquariums Made from evaporated sea water for all-natural results Use when changing water, when setting up a new freshwater aquarium and when treating fish disease Includes: Contains one (1) API AQUARIUM SALT Freshwater Aquarium Salt 50-Pound Box Intended Pet(s): Fish Product Dimensions: 10.25 in x 10.25 in x 15.5 in Capacity: 50 lb Directions: Use API Aquarium Salt when setting up a freshwater aquarium or fish bowl, when changing water, or when treating fish disease. Add 1 rounded tablespoon for every 5 U.S. gallons (20 L), or 1/2 rounded teaspoon for every U.S. gallon (4 L) of aquarium water. Note: Aquarium salt does not evaporate and is not filtered out, so it should only be added with each water change. Care should be taken when using salt with live plants, as some plants may be sensitive. Tip: API Aquarium Salt is beneficial when treating fish disease, particularly parasitic infections. For best results, use API Aquarium Salt with API General Cure or API Super Ick Cure. Caution: Not for saltwater aquarium. Care should be taken when using salt with live plants, as some plants may be sensitive. API Aquarium Tank Salt, Size: 50 lb | PetSmart