So this is my second grow attempt ever and on top of that my first attempt with a deep water culture system (DWC). My first setup was a closet 3 1/2 ft x 2 ft, I used four 90 watt CFL lights with flat white walls in place of mylar. I germinated seeds and started my plants using an aerogarden then transplanted them when they were about six inches into Fox Farm ocean forest soil. although my first grow was successful it wasnt exactly what I had hoped for. after talking with some seasond veterans I figured out what i had done wrong, such as lights being to far from the plant, wrong nutrients ect. I ended up with a yeild of only ten grams... Like I said it was my first time and made a lot of mistakes, but I had a great time making them and learned a lot from them. Now I have a similar amount of space this time lined with Mylar, more powerful lights and I am now using the hydroponics system I just mentioned so I'm hoping for a much better end result. My first question is why didn't my seeds take in rockwool? I tried germinating in rockwool originally, I adjusted the ph of my water placed the seed in the rockwool cube and placed it in a humidity dome four days went by and nothing so I resorted to the old paper towel method and the seeds germinated and I am now looking to place them in my rockwool cubes. My second question is; after the seedlings sprout do i have to water the cubes with any type of nutrient until the roots show and I can place them in the DWC system? I just feel as if the seedling wont be able to survive in the rockwool with just water?