Leaf curling

[Minime2020]

High everyone,
Ok I seem to have a slight leaf curling going on, on my auto white widow,
I feed/water with 5ml of a and b canna nuits, diluted in 5lts of tap water ph6 ( water until run of ) estimated a litre
I am using Coco coir,
3ltr fabric pots
Grow tent size is 40x40x120cm
1000w brulple led ( 20" away from canopy)
6" circulation fan ( running 24hrs )
6" carbon extraction fan (running every hour for 15mins)
temp is 21'c
humidity is 70 to 80%
I noticed the leaf edge curling after a heavy watering ( my bad I think )
Any advice please,
The auto jack seems to be fine at the moment

 

[pop22]

raise your light a bit, also, is there air blowing on this seedling? That curling is either light stress or from being wind whipped. I've not seen this caused by over watering, that would cause droop.

 

[Minime2020]

raise your light a bit, also, is there air blowing on this seedling? That curling is either light stress or from being wind whipped. I've not seen this caused by over watering, that would cause droop.

Thanks I'll will do that right now, and I have moved the fan so it does not blow directly on to the plant,
Thanks

 

[Minime2020]

raise your light a bit, also, is there air blowing on this seedling? That curling is either light stress or from being wind whipped. I've not seen this caused by over watering, that would cause droop.

Thanks I'll will do that right now, and I have moved the fan so it does not blow directly on to the plant,
Thanks