I've bred fancy goldfish, and this is what i do:
keep the tank at room temp for 3-4 weeks, with only moderate lighting
after the 4 weeks, SLOWLY raise the temperature 3-5*, use more intense lighting, and set up spawning mops around the tank.
you'll have eggs in no time, but since im lazy i wont both typing out fry care.
My question is, whats the point of raising feeders, if they're only 8 cents at the lfs?