Ok. It was really just a heads up as things can get out of hand as far as diatom and algae growth during the start up phase of a saltwater tank, just due to the swinging water qaulity and build up of nitrates and phosphates. I am honestly torn on whether to tell you to shut the lights off all together, since you have live rock with nice coraline and what not.Greg31;5024695; said:I am only keeping light on for about 5 hours a day.