I had a friend that was having issues with his tank. He asked If he could put some of his corals in my tank. I agreed and thought nothing of it. One of those corals was a gorgonian. I read today that gorgonians are highly toxic to other corals. They are even more toxic than Leather corals to my SPS. That might explain why my new millipora has died that was close to it. I hope this helps someone else.