Very difficult to be there at the moment of hatch, and if your'e 3 minutes late they are all eaten. I have managed to collect some and try a couple times, they seem to do very well on just rotifers for 6-12 days but die out by that point. So busy with clowns they are a low priority.
Was thinking that something like a good old fashioned guppy breeder would do the trick, fry tend to settle to the bottom. But still since I've no luck raising them it's not high on my list of projects.