I have read some conflicting information. Some books and websites state that zo's need bright light, some say medium light, some say high flow, some say medium flow. I have plenty of light in my tank and its about medium flow. I was going to put them near the center of the tank but am still a little sketchy on what kind of lighting they need I read somewhere (in one of my mountain of books about corals) that orange & red zo's need brighter light, and purple and blue ones need less light. If this is really the case where do red/blue purple/pink zo's end up? Is the color that they are talking about the center of the zoo or the edges of it??