Quote Originally Posted by Sweetpea View Post
I had a Koralia 1 here (bought it for one of my nanos but never got around to taking it out of the box), and I put it in the 90g around 11am. My pavona, pocillipora and millepora retracted immediately. I adjusted the flow so it went more over than at the corals, and it made no difference. I unplugged it after a couple of hours, and even four hours later they had not relaxed enough to open up.

<sigh> I know I need more flow because I have to regularly blow detritus off my plating monti (top/center of the tank). I simply(?) need to determine what is best for my corals and the limited space that they live in.
You do have to give your corals some time to adjust to the new flow.