I was expecting at least 1.5 pound/1000w HPS but only came out close to 0.85 pound :S The buds looked very nice big and juicy before drying but after it's dried there was no weight. At first I thought the scale was wrong or the difference between hydroponics and soil but I talked to some others and they said they have similar problems. We concluded that it could be the pH and the fact that the water has 260ppm of waste or whatever it is in it. Anyone else have similar problems? What if I use a reverse osmosis machine would it boost my yields dramatically in this case?
260 ppm would have the kind of affect your looking to get.
Where did you come up with this figure of how much you were going to yield?
Also, there are TONS of other factors that will affect yield such as basic genetics to the type of nutes used as well as CO2 exchange, etc. Also, how many crops do you have under your belt in this setup? If this is your first crop or first crop in this setup then you still have to dial it in. You will never reach the genetic potential of your seeds if your not dialed in...that means nutes, co2, heat, cold, RH...like I said, alot of factors.
My .02
CK
PS: Good job on the grow even though it didnt meet your expectations.