The usage of fish food/feed actually increases the things you can do with your pond. In a simple sense, you can grow more and bigger fish if you use feed.
Consider that a predator fish needs to eat 10 lbs of forage fish to gain (1) lb. of weight. That's a 10:1 ratio.
Feed converts at approx. 2:1. If you feed 10 lbs of feed, you should put on 5 lbs of weight on the fish.
