A seperate tank is needed to raise the fry (20-30 gallons for maximum yield). If you have a spare 10g then many clownfish breeders will paint 3 sides blue and the bottom black (on the outside

) so they can see the fry and the fry can find the food. I hear if you use PVC piece in a BB tank they will tend to place eggs on it so they are more easily moved. As far as prepared foods IDK. The traditional methodology is to feed live rotifiers and generally calls for raising them yourself as well as the green water required to feed the rotifiers. I have seen bottles marked "live rotifiers" but have no clue how effective they are. If you are interested I can post outlines for culturing both (from Aquarium Fish Breeding, Jay Hendall, Barrons 2003).