I know tangs eat it. I put the star polyp in with them because it was dieing of no light. I did put a emerald crab in there too, but alls I saw him take a little of of the macro. Now when I was riping it off the rock I notice that the xenia was not attached to the rock but attached to the algae for some reason. I tryed to get them to stick to the rock again, but then a couple weeks later its pretty much all dead now.
I was wondering if I could clean off by scraping the rock and then put it in my tank with the tangs or something so they could eat it all off.