I hate to see a topic go most all day without any response. I'm not going to be too much help but I might comment on more light. I would think you have plenty for time being. If one gets too much light without adding CO2 and/or ferts, one can get too much quite easily. No mayor problems and things going at least somewhat right? Steady as she goes and let it settle in a bit more so that you have a better idea before springing for the big expense of more lighting. I feel it is one area we read/talk too much about when we don't bring the other two up as well.