Live sand question

Hi all. This is really a different kind of question that you guys and gals are
probably used to seeing. I've seen a lot about the benefits of live sand in
marine aquaria, and of course, have live sand in my tank and in my refugium. My
question is what is the feasibility of using live sand in a freshwater garden
pond? Has anyone tried this, and if so, what were the results? I understand
that live sand in a marine tank is colonized by quite different creatures, but
it seems to me that if done right, creating a live sand bed in a garden pond
would be very beneficial to freshawater garden ponds. Any comments would be
appreciated.