So this is my first hydro gro and I've over come my first obstacle which was cloning. I failed at two attemps then built a aerocloner and had 100% success. So that said I figured I'd spend the money on a flo n grow. After mixing up 30gal of nutes I put 6 clones gently in the clay pebbles. After 5 days my stems seem real dark and hard and they don't seem to be taking off well. I'm using house and gardens. A+b, multi zen and root accelerator at the moment. Under 1000 watt hps. Any ideas why my stems are hard and dark and not healthy. I feel like giving up on hydro but u guys have had the right answers for me in the past. Any ideas would be appreciated