Worms (Enchytraeus albidus)
White Worms are an excellent live food for conditioning fish to spawn. There is some concerns that long term feeding can cause heath problems for your fish do to fat content.
White worms need cool temperatures to prosper, about 60 Degrees Fahrenheit seems to be optimal. A basement or better yet a Wine Refrigerator work well. Worm bedding can be used as to create a favorable home for your worm culture. Feeding the White Worms can be accomplished with Moistened Dog Kibbles or Bread Soaked in Milk.
At some point your culture will become very productive, after which it will crash. It is best to keep multiple culture to prevent the entire loss of your worms.
Video - Old Timer Presents Culturing White Worms