have fragged mine a bunch of times it grows like a week. Just take out of the water if possible and cut it with scissors. I put mine in to a bucket or bowl or saltwater while cutting. Then rise in water before returning to the tank. The cut place will heal to a bump in a few weeks. Do try not to cut in the tank, a bit too much chance of releasing bio warfare stuff.
This one I just gave away, they do grow like weeds.
