ok first off thanks for putting this up. i have been having trouble with my SPS. my set up is almost the same to a T but my alk is about 8.8... my color is set at 50% and intensity is at 80% running the same number of hours using the kessil controller sunrise to sunset.But just bought the apex jr . the SPS will do great for the first month or so then start to go the other way and brown or white out, a few have adjusted and are doing great but I'm not confident enough to purchase more until I've figure it out. It was the light and u may just confirmed that.I had a few people look at it but they're not to familiar with the kessils but based off your chart I'm way too high on intensity. if 45% is your intensity, what is your color setting? Or does the apex match the percent to the intensity? meaning does color max at 45% as well? thanks for your help.