i use the
botanicare line and i like to never really exceed 14-15 ML of bloom throughout flower cycle, i build up to that, although i am using some other additives like
MOAB so the need for the bloom isn't as much.
seems to me though that most people using PBP Bloom use like 15-18 ML /Gal from week 1-Flush. you can always play around with stuff like a little more
hydroplex and a little less bloom as you go. are you planning on using anything else like sweet or another bloom enhancer? sweet raw is awsome and trich development is hands down more noticable, i've been using
MOAB with great results this round but in the past i've use BloomBastic in soil and hydro with solid results aswell.
your gonna be set though, you may find yourself wanting a 1000watt for the 2nd half of flower after the stretch, in that tent with a 1000 watt i've seen people get like 2+ pounds, regardless of the number of plants as long as you fill it out EXACTLY like you've done.
last question, are you gonna lolly pop or under cut like some say everything? i've never really done this as i believe leaving everything is fine as long as it's not in the way or dead but i would think in your case it might be really benificial. just some food for thought i guess