Help! I’m not sure what this is.

So About a week ago I picked up these clones from a dispensary and at first they appeared to be fine. I took them home transplanted them into 1 gallon pots. I’ve been watering pH 6-6.5 and haven’t feed nutrients. I’ve only watered them 2 times since I’ve had to make sure I don’t over water. I’m using Fox farm happy frog soil and I have a 1000w light 3.5 feet above canopy. pH has been 60%-75% temps have been 65-75. After about 4 days I noticed then brown/gold spots on a some leaves not all just a Few. 2 of the 5 plants appear to be effected the most. I’ve noticed slight growth but I’m sure that this problem is stunting their growth.

I haven’t started giving them nutrients but I think I will start this week. I’m using fox farm.