Leaves curling on sides and ends, very dark green, but just on upper half of plants
DG looks the worse,
Zone effected slightly,
WR not bothered at all
week 3 flower (wk 7 FF schedule) w/Beastie Bloom this week.
watering 5 X a day, 15 min
4 x 400w
res change last Thursday, was showing signs then
water temp 71f
air temp 80-95, lots of fans
Come on guys, let's figure this one out.
Deficiency or Temps?