Your nutes maybe just a bit high for that strain but I don't think so. What is throwing me off is the watering time. I think it should have alot more time in between on time sprayers. If the sprayers are pointed up and wetting the rootbal then they sound like they are overwatered.

In hydro or soil there is no such thing as overwatering. It is more a matter of duration of saturation. Almost any plant will die if the rootball does not dry out an hour in 24 hour period. This period can go longer but the chances for drowning become greater too.

I would suggest increasing your dry time till you see some droop and then leave that and increase your wet spray time. Say 15 minutes on and 1 hour off or adjust 10 minutes on 50 minutes off. You will find the right times for your setup. Tweak the system is what it's all about.

Hope this may help. We just had along talk about overwatering and what it really means. I understand now mistakes I have made. Let us know so we all can learn. I may want to setup your system one day.