Hi im new to the forum and growing and can do with some help please,im 5 1/2 weeks since switching to 12/12 and have problems with yellowing bottom/middle fan leaves,growing with 400w hps ph 6.5 ionic nutes 5ml/l bloom 1ml/l calmag was giving pk boost but cut that out last feed incase was the problem,also gave 0.5ml/l veg nutes last feed to see if itll help,i trimmed quite a lot leaves of and now worried ill run out of healthy leaves,its skunk#1 so guessing i still have 4 weeks roughly to go and worried it wont make it to the end any help appreciated thanks