Is this nute burn or mag dif or..??

Check my pics out, this is happening on a few randon plants. its a soil grow, one for week for veg. ive been feeding with foxfarm big bloom, they have had 2 feedings, next one is thursday. water ph is 6.5, room temp is 83.

i posted last week, kinda of the same problems. however there wasnt the dark spots... my plants were yellowing and i came to the conculsion that they were hungry and it seems they are getting back to green, minus this new condition. the leaves in the pics are from the lower part of the plant.

I appreciate any help or ideas.

Thanks

anyone want to help me out here???

Please

If your plants are only 1 week old don't use nutes. Wait 3-4 weeks or so.

that plant cannot be 1 week old.

nope... they are 5 weeks as clones