first time grow. please help

[beelzeboss]

what does it looks like? the smaller plant didnt look good from the begining shoult i keep it? or just destroy it cause its just eating up nutes and if it has low very low chances to survive
the spots on the leaves i think are my fault (sprayed them and probably didnt gave them enough darkness after)

 

[Imhigh85]

I can't tell you exactly what deficiency it is but my advice would be never to kill your cannabis plants they are almost impossible to kill they can recuperate very quickly take closer pictures of top of leaf and bottom of leaf

 

[beelzeboss]

ok took a closer pic of the small plant and of another one (the spots i think are because of the spray)

 

[Imhigh85]

Looks like it could be spray or nutrient burn