I took advice off jb mate on his thread and he said he never went over 12ml cos by the time he'd raised to that amount he was addin a lot of other additives so would be to high ec, i think youve just raised a little quick thats all, your good on the rhiz mate i was usin at 16ml/4L, a US g is 3.8L i thinks so 15mls about the same, i think i said dont raise the a&b as quick as the rhiz mate but could be wrong sorry mate you just didnt put your amounts down for a while and i must of missed or somethin or i would of said sooner, i'd go with the 8ml mate but i was a little slow raisin, 1st run and no ec meter maybe could have gone a little higher. You may be good with the 10 though mate cos like i said you plants alot bigger then mine at that stage. hope this helps bro lol