Hikari gold is an excellent slow sinking pellet for goldfish [especially koi and orandas]. They also love tetrafin flakes.Also they like blanched zucchini, peas and fresh lettuce. Use a veggie clip and remove what they don't eat immediatly.Mine also love shrimp and bloodworms.These fish grow fast and big given a good diet very clean water and lots of room. These fish require a lot of surface area. They also live 20 years or more. Good luck with your fish. I have found goldfishes to be very personable. Oh, yes they like oranges.