The microworms and vinegar eels are what I raised my baby bettas on. It's super easy to culture them. You'll look for someone who will give/sell you a "culture" which will be a small amount of oatmeal(or cornmeal) with lots of nemotode like wormies.
You dump that into a flat tupperware of moistened oatmeal, and it turns into a billllion microworms. Then you harvest them until you're ready to make a new culture. Make another bin of moist oatmeal, and put a tablespoon of wormie gunk from the first culture. BINGO... a second culture.
There's a ton of tips and tricks on how to. But once you get the cultures, and get it going, you should be set. There's also some great foods like "trout chow" made by purina that is STUPENDOUS for growing the babies.
Once the baby bettas start to drop out of the nest, remove dad. He'll just get mad at retreiving the babys and trying to stuff them back into the nest and start eating them at that point. He'll tend the nest well though, if he's a good daddy fish.
The newly hatched bettas are teeeeeny eyeballs swimming around. Nearly impossible to see. You'll love them. Should be a couple hundred.
Hope you do well with them.
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