Hi, by chance did you purchase this from the store off of Clairemont Rd in San Diego (just north of mission valley)? I ask because I tore down my 300 Gallon Reef tank in 08 and sold all of my corals to a shop in that area (I can’t remember the name). I definitely had a Red Robin in that bunch that I sold - grown from a small frag. That would be one heck of a coincidence, especially since I randomly came across your post by simply searching for pics of red acros. And the coral in your pic looked familiar.
Anyway, that was a long time ago and I hope that things worked out with the coral.