I've had mine for maybe 4 months, perhaps longer. It is hung upside down, in moderate but turbulent flow. Deep red with snow white polyps. PE mostly late in the day, yet opens randomly during the day. When I first got it, I turned off the pumps, target fed it oyster feast/ROE etc during periods of PE, then got lazy and left pumps on but still target fed. Now, perhaps every other week, I'll squirt some Oyster Feast in front of a PH and call it done. Has tripled in length, added several arms and looks great. My biocube is rather dirty though, so there might just be enough stuff in the water column to keep it healthy.
All that having been said, I bought a second one from a different LFS for my new 90g. I knew the second one had no history of PE, I had to tell the owner how to care for it, and bought it a few weeks later. I got a little PE, but they were just stalks, no fronds, if you know what I mean. Twice it released from where I hung it, then disolved into little red needles. I did try to feed it, but I'm not sure it was able to collect the food and simply starved. Maybe just not enough gunk in the water to suppliment feedings? I really don't know.