How you doing , i'm a new grower and I'm running into some issues in my vegetative stage . The problem is my bottom leaves are now turning yellow and this vain/ stem in between the leaves are remaining green I'm going to post some pictures so you can see what I'm talking about .Can anybody tell me if this is a magnesium deficiency problem or a nitrogen deficiency problem ???? Oh and for some reason my pH is running about 6.6 in pure Coco I've been adding distilled water at 5.8 to bring it down any other advice as far as bringing my pH down ? Just give you a quick rundown of my set up I'm using a 2 x 4 tent going in at 3 gallon pot of pure cocoa from General hydroponics Coco tech and using a 600 W LED light pure Coco I've been adding distilled water at 5.8 to bring it down any other advice as far as bringing my pH down ? Just give you a quick rundown of my set up I'm using a 2 x 4 tent going in at 3 gallon pot of pure cocoa from General hydroponics Coco tech and using a 600 W LED light