Bump it in a hurry! Seeming how you only have Micro/Bloom, then boost nutes in a hurry! 1/2 strength should clear things up a fair bit if you are only doing 1/4 atm. Try the 1/2 for the next week+ and then go from there.
Looks to just be at the very verge of N def. New growth is usually much lighter, but I see it on lower leaves as well on 1 or 2 pictures. Looking like you are growing a strain that requires a bit more N that what just the Micro/Bloom supply to me.