used half a teaspoon or 2.5 g per gallon of water, handwatering smart pots. Only double it once or twice. Can see that I can stay at that measurement throughout. I am using the new formula, actually that will make it where I will use even less overall than I initially thought, win win. Am gonna have to do a flush, I read where others don't. Not a long one, though. I really like the Megacrop, thru and thru. That and URB, and a calmag/carb additive of your choice I been finding is all that's needed for a nice, sucessful grow. JME.