A couple of ideas for you, (lifted from various web gurus etc).
My favorite: if there are pieces of gravel or rock stuck to the coral, super glue that to the rock...toad will attach soon after....zoo and shroom method.
The other, I have had mixed results with, is impalling or wedging..with a plastic toothpick or sword into the rock for a week or two. Also you can run fihing line trough a hole (via sword) and lasso the rock....cut stitch later or carefully use a rubber.
If the coral doesn't get infection (knock-on-wood) the only probs I had was the water flow ripping the frags loose..and I get to do it again...never did find that orange rici
Good luck, hope you don't get too slimy
