New auto grow help

[Stanleykn]

Hi

First grow and thinking this Is too small for just over two weeks since pop.

coco/perlite 80/20
Yellow leave bottom has just yellow shrivelled (pic 2) 2 other plants look similar.
speed autos

whadya reckon?
Ta

 

[browncoat]

I have no experience growing but I am inclined to ask what are your temps and humidity readings? Also what light are you using?

 

[AutoWonders]

Which coco are you using? Which light? What kind of water? Pic with light off would be more helpful.

 

[Stanleykn]

70 h
26 temp
Coco choir with 20 perlite, brick. I didn’t wash it as I didn’t know but I’ve got a sack of pre done coco with 30 perlite which might work better next time.

Tap water and Ph to 6
I haven’t checked run off
400 pp
600w led but it’s Chinese so could be less?
Will get a pic of the light thanks people