Thank-you for the feedback. 24/7 mode might maintain the plants well down the road, but I think I need to give these new plants a bit of a boost. The timer comes on a 6am. I think around 12pm or 1pm, I'll switch to max mode, then back to 24/7 at 6pm. Between root tabs and Flourish Comprehensive I think there's plenty of ferts and the extra light might give a good kick start...but I'll be watching to see if this is trouble. Obviously plants can't grow without light, but with the possible exception of algae issues, is there such a thing as too much light? How do you tell if a plant is getting too much light?