Bro that's an excellent response, makes perfect sense to me. Thanks for the clear description. I will adjust accordingly. My whites run at 30% for the whole light cycle -1hr ramp up and -1hr sunset so 10 hours. The tank is 25" deep, being a column I knew I needed to get a light with good par. I had the Fluval Nano Marine 25w and returned it after two days and bought the AI Prime. I'm glad I did, I really want to make this a show tank with sweet butt corals. I have a lot of great products (additives) that I'm excited to try out. Red Sea AB+, about 9 different products things from Brightwell Aquatics, Reef Roids target feeder tube. I took a break from reefing for about 7 years and just came back to it. Tank has been setup for 2 weeks yesterday. I'm super excited about this tank.