No more water until it is dry. Then just very little amounts. I'd keep my ph between 6.4-6.8. It is most likely from a touch too much water. The nutes didn't help either. If you just give it the plain water for a month I bet it will be fine.
As far as genetics go I wish someone had told me to get Gage Green's Starlet Kush for one of my first runs.
It is a very easy to grow plant. Stays short and bushes without doing anything. Handles transplants, water variances, etc without blinking. Two phenos exist from what I see. One is more pure indica and one is a hybrid with a touch of sat in the leaves. I see it on the males too. I would count on some real dank flowers from these.
https://gagegreen.org/skush.html
http://www.highlifeseedbank.co.uk/Seed-Brands/gage-green-seeds/Gage-Green-Seeds-Starlet-Kush
Buy it from this place. Safe bet. Tell Jay, the owner, Gandalf sent you. If you do buy from them let me know before you do. I can give you a tip.