If you try to divide the heads, make sure you are very careful. If you accidently break through the hard cover into the tissue base of one of the heads, most likely you will lose that head. The LFS that divided mine used long shears ridgid enough to cut tin. If I did it myself, I would put some of my tank water in a small container, place the coral into the small container, and use a diamond hacksaw blade to percisionally cut through the rock joint between the heads. I would cut in a small container to prevent cutting debris from getting into my tank. Good luck if you divide the heads.