My rock is on average, 16 years old and has already been cooked 3 times. It's had its battle with Mojanos forever, and is now fighting some very invasive sort of macro algea that just takes over. It needs drastic help this time around.

I would like to hear what I can do to kill, and restart this rock, clean as possible. After all these years, I am sure its bound up with alot of nutrients. Cooking isnt going to cut it, this time around.