hi, its the gold label peat with vermiculite.
i transplanted them 8 days ago from 10cm square pots into 6ltr round pots, they were 12 inches high when poted and put them strait into 12/12 flower cycle from veg stage, not sure if i should have veged them a little first in those new pots.

im pretty sure there wouldnt be any salt built up quite yet as ive fed them half the suggested amount (3.5ml per 1ltr of bloom and 1/2mil per ltr of boost instead of 1mil per litre) i feed on odds days and just water on even days so one day they get water then next they get food n so forth.

i dont use anything else no other chems etc.

i had a 2nd close inspection and i could see deep in the veins they are green but you have to look pretty deep to see it as there really is just too much yellow. the bulbs are pretty old now so that is something i didnt stop to think about, i may invest in some new bulbs while i have a few pennys left to spare.
thanks for your reply, just wish i could get a few images uploaded as it would help.