anyone know about the rubber band thing? ^
Anything that will hold a soft coral in place long enough for it to attach will work, provided it is safe to be in the aquarium and doesn't crush the coral. Another method that steve-s has posted about, is to cut the top and bottom off of a 2 liter soda bottle and stick one end into the sand bed. Place rubble all along the inside ot the bottle and place them in there. This will keep them from being blown around and give the a chance to attatch on their own.