If wanting to grow out a bunch, I would move them but the methods will matter. For small things that tend to mash easy or get hung up in nets, I like to stick a tube down and suck them into a container to pour into the new tank. My preference is a bowl with a rounded bottom so that there are few places for a tiny fry to stick in the corners, etc.
This seems to be a somewhat natural thing for the adults as a big thing coming by to suck a few fry is a pretty normal thing in the wild and it does seem to create a better parent for future fry if they are of a type fish with some of the more advanced thinking. When doing this, I find a helper to hold the bowl and watch for results to be very helpful as it does get hard to find the fry, start and stop the siphon and not run the bowl over!