hi, i'm an experienced grow(4 yrs) growing in aqua farms . just gone on to ntf on tray s ,2 tray to 1 water res. i have a good large grow room with 8 sets of tray with 10 jakera plants per tray. all cuts from same place nutriant same as well but 4 trays plants quite small 4 tays plants large full of bud etc. cannot understand why . any ideas ????????????