those buds in them pics look bad ass im guessing thats week 4 possibly week 5.
I cant tell you anything about koolbloom they dont sell your nutes this side of pond.
But you seem to be doing it right so good on ya.
I just had a look at at the koolbloom on google and I heard its pretty similair to to the stuff I use which is growtechs monsterbloom I beleive them both to be aggresive nutes and with my monsterbloom I use sparingly fom weeek two of 12/12 and slowly build up to nearly full amont if they can handle it
I used that shooting powder before (if you ever heard of it) and well I added to much and things got a bit burnt on the leaves
I found this link on the koolbloom I dont think you need much help you seem to be doing a very good job but ill leave it anyways.
http://www.gardenscure.com/420/plant-food-nutrients/99636-kool-bloom.html
I just got ten regular seeds of the jack herer from sensi seed so im gonna be interested how yours turn out.
I hope all that made sense in proper blazed right now