i have big bud and bud candy, with 5, 6ft tall flowering, soil plants.. the big bud powder says 1.5 tsp per 5 gal if i do that my ppm is only 400 or so? and the bud candy says 4 tsp per gallon that only brings the ppm up like 50? right now i'm going to give them both but the ppm is only 500 .for the next watering i need to know how much i need to give them i've heard 1400-1600 is right ? thanks