problems in the budding stage

Ok, so this planet hasn't been perfect, a few weeks ago I had a issue with the pH levels but everythings been running great..But I've noticed the last few days the leafs have started bending and becoming dyed out..

I'm 3-4 weeks into the flowering stage?
plus only the leafs near the top are effected.. The ones on bottom are just fine.
I'll add two images so you can see what I'm talking about..

Any ideas guys?

What kind of nutes and how much your using?

You got N abundance, please read sticky topic in this section. Its called N def and tox.

I'm using Aqua Flores A&B (http://www.canna-uk.com/aqua_flores) at the moment.. & I'm following the directions of the back perfectly and the pH level is 6.2

Oh and I've just started using 'Bloombastic' too this week... But the problems started before I started using that.. Only reason why I bring it up is cause I'm wondering if I should stop using it until I fix the 'burn' problem (if that what it is) or if I can carry on using it?

i don't get whats happening.. This is my first time doing this too lol
so any help will be great!

I mixed some more feed with a low LOW dosage for now to see if I can fix things but is it still ok to use the Bloombastic?

Anyone?