i have 30, 6 gallon pots under 4. 4 tube T5s. I'm using advanced nutrients sensi 2, part A and B only at ppm of 600 with ph of 6.3 (when I save a little money i'll get all the other additives) i water about every 5 days. the main 2 questions i have are: am i providing enough light, and are the lights too far away?