theres just over 4 weeks into veg from seed,im usin bio-grow liquid fertilizer which says 8% nitrogen-2% phophorus and 6% potassium which on a grow chart i got with the product says mix 1ml fert with 1 litre of water and to use it weekly which i have been doin and just usin plain water inbetween weekly fert.there under a 250watt MH about 13-14" above the canopy with fart fan extractor