ya, the dropping of branches is just a form { more than likley} of self propagation, nothing to worry about if a softie tank is what you are after, they will take over, if this is your first tank, you proably want to start a different tank when you get ready to upgrade to more exspensive hard corals, but I have a large softie tank with a lot of misfit corals in there, I have three or four different kinds of kenya tree, a couple different small leathers, xenia , a dozen or so different kinds of mushrooms, even the common pest aptasia they don't really bother me, they just battle it out for there own space, and the tank has really filled in in the last couple of years, and it proably gets the most attention of any of my tanks, when people come over to visit , and it is the least work of them all,