You might want to have a baby brine shrimp hatchery to feed the fish after they have outgrown the micro worms. Hatchery's aren't too much work to maintain, and they're worth the extra effort since you will get better fry survival rates.
One thing that you will need to have is an infusoria/green water culture, but these are really easy. Just get a jar of dechlorinated water and a pinch of fertilizer. Soon you should have pea-green water. Most tetra's, including the Von Rio's, will not be big enough to eat micro worms for the first few days following the consumption of their yolk sack.
Finally, this is completely optional, but it would be to your benefit if you added indian almond leaves, oak leaves, or beech leaves in the breeding tank. One of the benefits is that the indian almond leaves provide supplemental infusoria for the fry to feed on. In addition, a bacterial film grows on the decaying leaf, and this bacterial film is most likely the natural food that wild fish fry eat. Also, the leaves leech out compounds that prevent against bacteria, fungus, and other threats to your fry and prevent your eggs from fungus. Indian almond leaves are the best, but if you don't want to buy them, it is fine to collect oak leaves or beech leaves, provided they are not near a road or any other source of pollution. Make sure to wash these leaves under tap water to get rid of any contaminants. Here is some more info on the leaves. Using Indian almond leaves in aquariums
Hope that was of some help
EDIT: just saw that the eggs are light sensitive, so your going to want to cover the tank with a towel after the eggs have been laid.
This site is always full of good info on fish, if you havnt already, check out the flame tetra(von rio) profile. http://www.seriouslyfish.com/species...ycon-flammeus/