crinkled leaves

hi!

so day 3 of flowering ther looking great bushy and healthy sortov

noticed some crinkled leaves ??
600 watt hps
using vitaliink A and B 2ml per 5 litres im sure thats correct so 20 litre res 8ml? of each orederd vitalkink bloom A and B not for rite now tho week or so
temps min 27 MAX 31-31.5
ph level 5.6-5.8
using rockwool in home made wilma type job with pump feeder with dripper type things but they dont drip the sortof spray water out got em directed down at the roots
cant show images til 8pm uk time im afraid till the lights come bak on i dont disturb them when off

crinkled how?? Round the edges, just on the points?? Curling upwards?? Or crinkled across the whole leaf like a ridged crisp??

Pics... FTW!

just read your post again, 31.5 degrees, thats in there upper limit, might have something to do with it.

yeh its VERY rare it hits that temp thats just the highest i seen it and yeh wrinkles like a crisp across one half of the leaf i will ad pics at 8 when lights cum bak on

so thinking of adding another tray to the side i was gunna add that for grow 2 and add another 5 since wilma sytems are closer together than mine are but im thinking just add the tray and move 2 over to give more room what do u think u can see the crinkiles on the images

Too me it looks like over watering, and nitrogen is not being absorbed or not enough.