My Green Star Polyps are turning a cream/tan color. They still have a small amount of green in the tips of the polyps but their are a few completely cream colored polyps. So I am worried that they will all become cream colored. I have them under 4 - 24watt light bulbs. two attinic and 2 daylight. Any suggestions? Do I have them too close to the light? They are on the top rock.