I had the one with the Yellow polyps and the red branches. It lasted maybe 4-5 months before less and less polyps opened and finally none did. Beautiful pc. but very hard to keep. I now have a totally photosynthetic one but it is not nearly as pretty color wise, just a brown.
Don't have a pic of the new one. I will try to get one. There is also a Purple Brush gorgonian that is photosynthetic that looks kind of nice.