I haven't made it to harvest yet but from seed it is looking like I am going to get more than 2 oz from my best female and around 2 oz from 6 others and more than 1 oz. the last 2 runts. So a good estimate is 2 oz. per plant with a 6 week veg. this is very dependant on strain and conditions during grow though. But your conditions are very similar to mine. I don't think you mentioned what strain your growing. Do you know? Looks indica dominant by the leaves to me, this is good for big thick and heavy buds.

And yes go ahead and start the mollases and hydrogen peroixide in your next watering. And yes it works by itself. I have never used the nute your using what are the nutriant numbers for it? ie. 26/12/12.