I think you have been mislead. feeders are like neromancer says of little nutrition to your oscars. and goldfish as most people use are the worst. any person wishing to feed, feeder fish I would recommend that you first feed your feeder with pellets. after your feeders have eaten the pellets then feed to your oscar. this makes little sence to me but its the best way to get full nutrition into your oscars. why would you go through so much trouble when you could just give the pellet??? oscars would eat a very wide range of foods in the wild, fish would make up a very small part of that diet. worms,maggot,mealworm,beatles,larva,etc would be the bigger part of the diet.