Hey dahman,
Are u still looking for help? I had the same question, I figured it would be better to grow the seeds in rock-wool first, then transplant them into hydroton when they are say, 2 inches tall, basically when you see the roots coming out of the rockwool then transplant them into hydroton, you can use 1.25 L water bottles and cut them in half, and poke holes at the bottom for proper drainage. Also you can experiment with other things as well, but rock-wool and hydroton have worked pretty well for me. Hope this helps hey, Peace