So I'm 3 1/2 weeks into veg. w/ clones from a local dispensary. I'm running Purple Kush in 6" Grodan rockwool's in an ebb and flow system w/ 40 gallon rez and 1000 watt HPS 3 ft. from the top of the canopy. I'm using RO water w/ GH 3 part mix at 3/4 strength, CalMag at 1 tsp. per gallon, and 1...