I run 250 watt Radium 20k halides on my 220 gallon sps dominated tank. As the colonies are getting much much bigger they are beginning to shade themselves out on the bottom. Some of the bottom branches are turning white. Is this normal and ok? Does anyone else have this problem? What do you guys do about it, cuz it is a bit of an eye sore. More of my corals seem to grow up rather than out. Should I selectively trim off branches to get it to grow out more?