Hey Sweetreef. How long would you recommend keeping my lights on during the day? I have a 75 gallon with 2x150 MH, actinics and lunar lights. I just bought the light system a week ago and my algae is exploding and the water temp is raising 8 degrees every day. Right now I have the actinics to come on for an hour first, then the metal halides come on and run for about 10 hours and then the actinics are on for another hour then just the lunar. Any ideas would be greatly appreciated.