Hi guys im now on day 28 and just found my problem, my bluelab truncheon i thought done ph it doesnt........ Shit i was reading cf and adjusting to suit, i think ive gotaway with it i hope as the girls still looked great till today and although there nearly 24in tall a few leaves on tips of the larger ones have dry yellowtips which are crispy, i thought with the height of them it maybe light burn although it is lower down as well, they got there first feed of sensi a and b last week nut only 2ml per litre , god knows what ph has been though, there in plag light mix, do you think the larger ones just want more nutes or something more serious?