Goldfish are omnivores, so you can feed them peas (also good for the common problem of goldfish constipation), lettuce and spinach, bloodworm (frozen or dried), live brine shrimp and mosquito larvae.
Even though they will eat anything they are at the core vegans, and need live plants as well, try growing these for them:
Elodea and Egeria ("Anacharis")
Ceratopteris (Watersprite)
...

Goldfish are omnivores, so you can feed them peas (also good for the common problem of goldfish constipation), lettuce and spinach, bloodworm (frozen or dried), live brine shrimp and mosquito larvae.
Even though they will eat anything they are at the core vegans, and need live plants as well, try growing these for them:
Elodea and Egeria ("Anacharis")
Ceratopteris (Watersprite)
Pistia stratiotes (Water Lettuce)
Riccia (Liverwort)
Salvinia, Lemna (Duckweed)
Avoid Cabomba, Ceratophyllum/”Hornwort”, and Myriophyllum”Foxtail/Milfoil”.

If you have to feed them flake or any other pellet foods please soak the food for at least one min. That way some of the food has absorbed some water and will not expand in the goldfish.

Goldfish love all types of food besides the ones that the pet stores carry:

...

If you have to feed them flake or any other pellet foods please soak the food for at least one min. That way some of the food has absorbed some water and will not expand in the goldfish.

Goldfish love all types of food besides the ones that the pet stores carry:

Fresh foods: Romaine lettuce, Peas cooked, earthworms, eggs, cucumber, insect larvae, grapes,oranges, and spinach.

Dried Foods: Flake, Pellet, Tubiflex, Krill, Plankton, Brine shrimp, Blood Worms, Spirulina, and Daphnia

Free Information How to Feed Goldfish...This site gives you the best foods to feed your goldfish..It does point out flake food but has others food. click on this lind
http://petcaretips.net/how-fee...

Goldfish Feeding Tips
...

Free Information How to Feed Goldfish...This site gives you the best foods to feed your goldfish..It does point out flake food but has others food. click on this lind
http://petcaretips.net/how-fee...

Goldfish Feeding Tips
By : Dane Stanton

What's the best food for your Goldfish?

Goldfish need food that is a combination of carbohydrates and vitamins to help them grow and fight disease. They particularly need vitamin A to make their colors look bright. They do need protein but just about 12% so that they can build muscle. In the natural habitat, Goldfish mainly feed on plants. They eat a fiber diet that includes algae, grasses and aquatic plants in the natural environment. Thankfully you do not have to sweat much to provide them with the equivalent nutritional needs because you can get it off the shelf! These processed food available at pet stores include:

Flake food

This is one of the commonly available goldfish foods, especially made for them and it consists of brine shrimp. It is easily eaten by Goldfish and helps in avoiding a particularly fatal sickness called the Air Bladder Disease.

Pellet food

This is also flake food with brine shrimp but it's packaged as a pellet. The only problem with pellets is that it sometimes swells in the goldfish's stomach and makes it lose its balance. This is what is the Air Bladder disease.

Frozen food

This includes live food that is frozen. You have an array to choose from as in frozen brine shrimp, daphnia, tubifex worms or mosquito larvae. This will come frozen in slabs from which you have to break off bit-by-bit and hand-feed your goldfish. You can also opt for Freeze-dried foods, which includes Krill, Pacific plankton, brine shrimp and bloodworms.

Homemade food

If you really want to make the food for your goldfish and you have the time you can do so. You will find that their favorites are lettuce and peas. Take any type of lettuce, which would be easy for the goldfish to chew on and digest. Wash and rinse the lettuce in warm water and just clip it inside the tank with a lettuce clip. Do not cook the lettuce. As for the peas, cook them till they are soft and refrigerate them. At feeding time, peel off the skin and mash a pea between your fingers and drop it in the tank. Do make sure the peas are soft or you could end up bloating your goldfish. Goldfish enjoy plant food and that's why you can see them happily nibbling away at Anacharis and Romaine lettuce or pieces of cucumber and zucchini which you should make sure to clip on to the tank with a suction cup clip

Live foods

The live foods that goldfish can safely eat include Daphnia, Brine Shrimp, Tubiflex worms, Meal worms, Wax worms and Blood worms.

Special treat for your goldfish

You can make a special "gel food" for your goldfish that's quite easy to do. This can be given to the goldfish along with the main staple as a once-in-a-while treat. Here's what you need will need: a packet of unflavored gelatin; an empty ice cube tray and a 2.5 oz jar of baby food in a vegetable flavor such as carrots, peas or green beans.

Take ¼ cup cold water in a small saucepan and pour the contents of the packet of gelatin in the water and stir over low heat until the gelatin dissolves.
Add ¾ cup water, stirring till it's well blended.
Add the baby food and stir thoroughly.
Now pour the mixture into an ice cube tray and let it cool for about half an hour.
Refrigerate the mixture for a few hours till it solidifies.
When it's feeding time just pop out a cube, cut it into small strips and feed it to your goldfish! One tray is more than enough for two 4- to 5-inch goldfish for a week. Make sure you dump the leftovers after a week, as it's good to give them fresh stuff.

Whatever it is, you will find that your goldfish are not fussy eaters. They have a wide array of food to choose from and they can eat quite a lot, which you would need to regulate. You will need to remember that they are temperate fish that do not need a diet high in protein. Goldfish are classified as coldwater fish and, as a rule; do not need to eat a diet that is high in protein. What they need is a carbohydrate-rich diet with the adequate vitamins.

That is why the best option for Goldfish are the floating pellets or the flakes which are specially made for Goldfish and have all the necessary nutrients. Ask your goldfish dealer as well as other owners and decide on what is best for the goldfish.

Having 30 years experience in everything Goldfish, Dane Stanton has spent the past 18 months researching the most pressing questions on Goldfish. This information has been recorded in his book titled - "Goldfish Secrets Revealed" - which you can pick up by going to his website - http://www.goldfish-secrets.co...

click on this link for more information
http://www.my-pet-goldfish.com...

Good Eaters. All goldfish start out life as tiny eating machines not much bigger than one of your eyelashes. Most baby fishes die unless they find small, moving animals (protozoan) that trigger their eating reflexes. Not so with baby goldfishes. They are not picky eaters. They even eat unhatched (but indigestible) brine shrimp eggs.

Fry Foods. Because they eat anything, comet goldfish fare well on flake an...

Good Eaters. All goldfish start out life as tiny eating machines not much bigger than one of your eyelashes. Most baby fishes die unless they find small, moving animals (protozoan) that trigger their eating reflexes. Not so with baby goldfishes. They are not picky eaters. They even eat unhatched (but indigestible) brine shrimp eggs.

Fry Foods. Because they eat anything, comet goldfish fare well on flake and other prepared foods even at their youngest stages of life. Just be sure to crumble the fry’s food into dust-fine powder or feed them the special fry food made for egglayers. This makes goldfish easy to raise. They are survivors.

Eat Anything. Baby comet goldfish eat anything small enough to fit in their mouths whether it moves or not. Other fry eat baby brine shrimp because they can’t resist their twitching, tasty bodies. Goldfish will even eat the empty eggshells. You can see the brown shells in their amazingly long (long for a ¼-inch fish) digestive tract.

Best Fry Food. Naturally, comets fare much better when they eat the actual newly-hatched brine shrimps. It’s fun to watch them turn orange as their long intestinal tracts fill with tiny shrimps.