I Love my Goldies
Never had to cull and I've had my pond for over 15 yrs and it's about 2400 gals and still only between 75 and 100 fish. Most of them small. Nature seems to control it so far. Goldfish and Koi love fish eggs! I think my goldfish gobble them up as they come out! Once in awhile I see a baby or two that got lucky and made it. Also Dragon Fly nymph's will eat the baby goldfish.