So no pics yet, but here it goes....I've got 4 plants, Big Bud from Nirvana seeds, about 6 inches tall with about 6 nodes (so not much stretching) in rockwool 6 inch cubes with a flood and drain system. My cabinet is 2'x3'x5'. I feed them twice a day with dutchmaster nutes. I've got a 600w HPS about 1.5 feet from the tops on 24 hours a day. They look great, really green leaves and thick stems, and a lot of white roots coming through the bottom. Ph is usually 5.5-6 and TDS states 1100-1475ppm. Here's the problem(?), are they growing too slow?? They are 6 weeks from seed and by looking at other posts, it seems I should be ready to flower. If these double in height during flowering they wouldn't even be 2 feet tall, and I can't imagine much yield from that. I haven't used H2O2 yet because my nute solution is still pretty clear, but I guess there could be unseen algae growth. Could this be slowing me down??? This is my first grow so any and all comments are welcomed, Thanks.