dark brown spots

Hey guys need some help on my first grow. I started a auto runtZ from Barney farms on June 1st 2 weeks ago and i think it’s growing pretty slow. At the moment it has dark spots on the leaves while 2 other leaves has stalled out. I had a little problem with spider mites but I sprayed it with...

Hi guys I have a problem as you can see (pictures a few posts down) and I would really appreciate your advice. Its super silver haze in week 7 of veg, in special batmix soil house and garden soil A&B nutes Magne-cal under 600W hps about 13"from the bulb. Im thinking its nute burn even...