So as some of you may know I just moved but during that move I have pulsing xenia on my spray bar in my tank that when I turn off my return pump it is above the water line. So, from when I pulled the plug on my tank to filling back up and turning it on at the new home (4-5 hours) my xenia was out of the water. During that time every hour I resoaked a paper towel and draped it over them and only 1/3 of the colonies stalks died! For all you that think corals are extremely delicate and sensitive here's proof that they can handle more then you may expect lol