I have some fry living in my sump right now.
It's the first time I've had fish breed, so I don't know much about fry. But I had a couple batches, and the first batch about half the fry went over the weir and into the sump.
The second batch I put in a 20 gallon tank.
The fry in the sump grew MUCH faster, more survived, and I don't even know what they ate for the first 2 months when I didn't know they were in there.
Fry in the sump works REAL good.
I just don't know how I'm gonna net 'em outta there.