Rasboras

(having found rec.aquaria and sci.aquaria deserted, I posted over in
alt.aquaria, and was directed here as perhaps being where everyone was,
so I'll try posting this here, too)

After several years of dry tank (for a combination of reasons) I'm
filled up again to provide the Harlequin Rasboras from my wife's biology
teaching room a place to live over the summer while the building is
remodeled. Years ago I made semi-serious attempts to get R. Heteromorpha
to breed, with no success. Since they'll be here, I'll make another
attempt, though it might be somewhat half-hearted, given past history.
It would be rather nice to have 30-50 or so running around the 30 gallon
aquarium, but I don't want to buy that many. In looking for up-to-date
information, I found at least one (web) source claiming that the old
acid water advice was off - only soft, not acid is required, they claim.
I could not find much else.

http://www.dfki.uni-kl.de/~elst/html...lekine_info.ht
ml

I found several un-replied-to posts requesting R.H. breeding tips in my
searches though the newsgroup archives.

Anyone with success to share, etc? Given my overall experience with
aquarium plants, anyone know if they'll use plastic broad-leaved plants
instead of real ones to lay their eggs? Suggestions for a foolproof real
broad-leafed plant? If I use collected rainwater for water changes to
keep the water soft, will they eat any mosquito larvae that might be
present?