When I frag zoo's I actually chip the rock they are under with a chisel. I'm sure there is a better way than that. You might want to ask Travis (Tstaut). He has a propogation tank for zoos.
http://www.reef-life.com
Most zoo's don't contain polytoxin. However, if you are allergic to bee stings, etc. wear latex gloves. (Actually a good practice in any case).