I don't know that we have many growers here using nutrients in hydro. Here's a link to the feeding schedule for hydro: http://foxfarmfertilizer.com/images/pdf/HydroENG.pdf. This looks good to use with a couple of exceptions. It's based on growing photo sensitive plants, which can tolerate nutrients a lot more than autos. So I would suggest using half of what they recommend. Also, they show a 4 week veg period and 8 weeks flowering. Autos generally run 5 - 6 weeks in veg and 4-6 weeks in flower. So follow their veg schedule until you see vertical growth stop, then switch to the flowering schedule.
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