fishin4cars
True friends just call me Larkin
Shelly, Good Koi food can be used with goldfish and get basically the same results for both species. I use the same for both and have no complaints. If you have just goldfish some food has been specifically designed just for goldfish. Problem is, price it out per pound with koi food and it doubles or triples in price per pound. I have no clue why but goldfish food it usually smaller and lighter in weight. If your going to feed both try and find a pellet size of less than 5mm. Unless you have koi of ever 18" they will be fine for both Koi and goldfish. Dr. Fosters and Smith brand and Blackwater creek again are good food for the money.