Goldfish food
Goldfish are omnivores, this means they can eat almost anything, vegetables or meat. Goldfish need less protein than other common aquarium fishes, so they need other food. The retailers sell different types of goldfish food.
Goldfish flakes have another composition than the standard fish flakes because of the different nutrition feed of goldfish. Goldfish food pellets have the same ingredients as flakes, but are compressed in pellet form. Frozen food brings the benefits of life food, daphnia, tubifex worms, brine shrimp and other frozen goldfish food are available. Some professionals feed live food to their fishes, although it can be dangerous if done incorrectly. Bacterias or other deseases could be the consequence.
Some household or other homemade food can also be given to goldfishes, like lettuce or cooked peas, just shred it and give it to your fishes. Their are some receips on the internet for special gel goldfish food. These are very easy to digest. This will give your goldfish another bit of diet variety.