Algae, weeds, insects, leeches, and worms are great naturally occurring lake and pond fish food. However, fish also need supplemental nourishment, particularly if you're growing them for sport.

Do pond fish need feeding?

In a pond containing few fish you need hardly feed your fish. They eat insects and larvae which naturally live in a pond. ... However, if you have many fish in your pond or large specimens, feeding your fish will be necessary.

How do I get my pond fish to eat?

Throw a small amount of food in the pond (just enough to let the fish know it's feeding time), but also keep some food in your hand and submerge it just below the water (you may need to keep absolutely still for a few minutes until the fish come to feed).