To use Nutrafin Max Tropical Fish Colour Enhancing Flake Food, simply open the container using the specially - designed lid as a dispenser. Sprinkle a small amount of the flakes into the fish tank once or twice a day, based on the number and size of your fish. Don't overfeed, as uneaten food can pollute the water. Keep the container in a cool, dry place to maintain the freshness and quality of the flakes. If you notice any signs of spoilage, such as an unusual smell or change in color, stop using the product. This food is designed for tropical fish, so make sure it's suitable for the species in your tank.