Humbolt headband 6 weeks from seed. Gh nutes with cal mag plus. 400 ppm they wont eat any more than that. Distilled water and hydrogen peroxide. 8 ml per gallon. T5 8 bulb 4 red and 4 blue. Res temps stay between 62 and 68. Left one showed signs of nutrient deficiencies. I had a ph spike once...