Thanks for the replies. SoLiD -- I can control the flow pretty well. So, your frogs and hammers are under MH light, near the surface? Sounds like it can be done. Did you light-acclimate them, using screens or whatnot? How long were they there, or are they still there?
caferacermike -- you say you've seen it done (even if they don't extend as much). Do you remember if the specimens you viewed long-time residents in those high-up location? I'm hoping they were there a long time. I am interested in the long-term health of the coral (of course).
Like I said, thanks for sending your thoughts. ..Karl