This is our story of raising briareus eggs in Dallas:
Last spring Debbie's (dbbga) briareus laid eggs. After about a month, Debbie and Alicia (from the store that sold the briareus) removed the eggs from the mother just as they started hatching and put each hatchling in a plastic cup with a small amphipod and a bit of seaweed. There was also a supply of mysid shrimp to feed them with.
Debbie eventually let her hatchings loose in her large mature tank. I took six hatchlings in their cups and put them into a mature 19 gallon full of amphipods, and Alicia kept hers in the little cups and fed them every day. Debbie saw one of her hatchlings after a few weeks, and then none after that. Alicia raised one of hers for about two months. I thought all of mine had perished, but after four months, my husband was cleaning the algae off the glass, and out popped an angry little red octopus. So one had made it! However it died a few weeks later, maybe bitten by something in the tank.
So there was some success and it appeared that the hatchlings have a better chance in a mature aquarium full of amphipods and places to hide than being raised in little containers.