Neons? really ? wow they should be gone!
Every fish in with them will be beaten to death if not removed.
when youve done that just leave them in peace (no water changes).feed as normal.
They will hide their eggs at the surface amongst the floating plants (if you have any in there) so no nest as such.
Chances are there are eggs or wrigglers in there already ,anyhoo good luck with them and keep us up dated.
p.s you might wanna re jig your filtration (no current at the surface) as every thing needs to be calm as possible.
