I grow in promix bx. I mix in some dolomitic lime, espoma plant tone, and a little bit of blood meal. I occasionally have to mix in some epsom salts when I water. I veg in 6" or 8" pots, and transplant to 10" pots to flower. I flower under about 350w of fluoro lighting, and a 70w hps. I had a 400w hps given to me, as soon as I improve my ventilation I'll be hooking that up.