Hypothetical question for best land grade in a 1 mile diameter cylinder

--- In spacesettlers@yahoogroups.com, "levi1_ca"
> --- In spacesettlers@yahoogroups.com, "Xenophile"
> wrote:
> > --- In spacesettlers, "Dave Logsdon" wrote:
> >
> > > From: Xenophile
> >
> > >> I'm rather fond of the idea of having the window areas double
as
> > >> lakes.
> >
> > > If you keep the water as filtered as a swimming pool, it'd be
> clear
> > > enough to do this, and such a pool might be an interesting
> > > showpiece for the habitat. But, if you actually try to make
> `lakes',
> > > with fish, and other living organisms throughout, I don't
believe
> > > you'll have enough clarity to pass sufficient light through.
> > >
> > > Dave