Honestly? People make this way too complicated. Just get some miracle grow potting soil, feed with half strength MG and let the plants grow. I know it's not quite that simple but if you're going through this for the third time then I'd try something else.

Have you had a successfull grow yet? Take it from someone who has made a few major mistakes and try to keep it simple. Thats a pretty sick feeling to see happen to your plants. I fried 6 beautiful fully budding plants a good month in by trying to juice them as if that wasn't bad enough I had to tell my buddy who I promised a very nice fat bag once they were finished and I had been bragging about how we were gonna be set till next fall.