Red Slime Control will quickly and safely remove the red slime (Cyano bacteria) from your aquarium without harming any of its inhabitants. In addition, unlike some other products, Red Slime Control will not discolor your aquarium's water. Red Slime Control is safe for all types of saltwater Aquariums and will not harm any of your fish, corals or other reef invertebrates. Take control of Red Slime before it takes control of your aquarium! This package will treat 400 gallons (1514 liters).