hello people.. im in the veg process and ive got the standard a n b formula for veg and flower, my question is, what add on chemicals/nutes r great for veg? and what add on chems/nutes for flower have you pro's found to work...? pk 13 i heard you use for one week only, 3 weeks before you harvests. Any other nutes i can use? spray on or ones you add to the water on top of your normal nutes that will help.. running a aeroponic setup also Lst them, this Lst is great!!!