leafy lettuce, oranges, peas, wild rice, zuchinni, squash, sweet potatoe, cantalope, water melon, brocolli, etc.
Blood worms, daphnia, black worms, and earth worms too...
Heck there's a lot you can feed him, but these are "treats", once to twice a week kinda treats. Staple pellets are good for everyday and contain several vitamins and minerals and protiens your goldie requires.