If you have the pond the rest is fairly easy. Goldfish are easliy spawned, and yes, they are ALOT of work if done inside . The males will get "white pimples" on their gills indicating their readiness to span. I fed mine night crawlers from the garden and that help put them in breeding condition. The trick to the spawn is water temperature. They spawn outside when the season changes from winter to spring, opposite of Cory cats. The warm water triggers the spawning, and if you let nature take care of it outside , you'll end up with a pond full. They eat ALOT of mosquito larvae which makes them grow fast. MAke sure you have plenty of vegetaion for them to eat as they are domestic carp, and LOVE plant matter.