Well, I know this is too late to say. But, I've bought a pink aussie cynarina just like that with white stripes in the middle about a month ago and from my experiences it requires really really low water flow. I've put it in an area where it was just low water flow and it expanded to 4-5inches(2.5 inches being the skeleton) and then I transfered it to another low-medium water flow area where it got really stressed out and wouldn't expand to its fullest... So this coral is like a yuma ricordia, it really needs low water flow. Water quality doesn't have to be that great since my water quality isn't so great. I can post a pic later tonight to show how it looks expanded.