I did a search and found a thread on it from 2006, stating:
http://www.captivereefs.com/forum/corals/lets-talk-suspension-propagation-2404/
LETS TALK SUSPENSION PROPAGATION!
This is something that I have been doing quite a bit of research on and to be honest am pretty excited to start it.
What I am talking about is suspension grow out. And by this I mean taking a coral frag and tethering it to a piece of polyester thread and hanging it from a rod and suspending it in the water.
Sounds strange doesnt it!
So ask yourself: "why should I give this a try when all I have to do is glue it to a piece of rock?"
Well the advantages of suspension fragging are beneficial.
For one you are going to get a very different growth pattern than just the upright growth of an attached frag.
It also optimizes the flow around the coral and the lighting that it recieves as a whole.
The one thing that I really like about this method is that is uses sooo much unused water in a frag tank!!!
and by optimizing this unused water you are liberating the coral from the influences of shelter and shadow from rockscape, as well as from competators.
This method gives the vunerable divisions further protection from many benthic pests and predators (worms, crabs, encroaching algae). It gives you maximum control over coral colonies from interspecific aggression as well.
I have been reading accounts of other hobbyist practicing this method of propagation. They have reported a very significant increase in the rate of growth. This is something that really caught my attention.
Some of the species that have had very good success with this method are: Pocillapora, (Seriatopora and Slylophora), Agaricids (Pavona), Galaxea, Psammocora and Hyndophora, Acroporas.
I am going to be testing this theory on several diff types of acro and Galaxea and Hyndo.
I will start a log document the rate of growth and will get lots of pics to keep you guys informed of what I find.
Those are pretty much the reasons Ken started using this method for his nurseries down in the Keys. I think it would be very interesting and helpful if you (or anyone) tried this and documented it... so if you do, please start your own thread about it so it doesn't get lost here.
PS, the wife had me out Christmas shopping last night so I didn't get a chance to upload the vids or pics from the holiday party. I'll try to get to it tonight.
here is a picture I took from Peter's tank ~ 2 years back!
Ken said just wrap monofilament around or drill a hole in the base and the coral will encrust around it