I have a ricordia that has 2 mouths about 1/8" apart. How well would it work to just leave it on the rock and cut it in half right between the mouths? I dont want to kill it though....
If it has two mouths then it has already started the process of self-propagation. Soon it will become two mushrooms. If you still want to propagate the coral by cutting then just cut between the two mouths and each half will become an individual mushroom.