Using NorthFin Marine Formula fish food is easy. First, determine the appropriate amount of food based on the number and size of your fish. You can start by giving a small amount and adjust as needed. Sprinkle the pellets gently on the water surface, and the slow - sinking pellets will gradually reach your fish. Feed your fish 2 - 3 times a day. Remember not to overfeed, as this can lead to water pollution. Store the fish food in a cool, dry place to maintain its freshness. Keep the package tightly closed after each use. If you notice any changes in the food's appearance or smell, it's best not to use it. With proper use and storage, this fish food will keep your marine fish healthy and your aquarium clean.