Yellow spots

Hello ,

Im growing super lemon haze , few day's ago those yellow spot's come out on 1 plant (of 4) .
And in another plant i have a hole in the leaf
Should i worry ?

stage : 3 week's in veg
pot size : 12L
Light : 250W mh
Temperature : between 19-26c
Nutes : Hesi kit , start feeding after 1 week (once a week) follow this schedule :
http://www.gothamproductsinc.com/catalog/nutrients/soilschedule.jpg
Water : 6.5 ph , every plant get's 1L of water about 2 times a week (total 3 with nutes) .

I believe the hole is from wind damage from a fan. Some strains dont like high winds..
And the dry patch is where you watered with nutes and splashed it on your leaf.

10x !