Continuous leaf problems

hi, i recently posted about some problems with my plant https://www.rollitup.org/marijuana-plant-problems/485256-lower-leaves-starting-turn-yellow.html and took the advice on board and lowered my ph to between 5.5-6.5 , re-potted my plant for more root growth and upped the amount of nutes i was originally giving and my plant is still having issues as seen in the attached pictures. i was wondering if anyone had any more ideas? driving me mad!

original thread https://www.rollitup.org/marijuana-plant-problems/485256-lower-leaves-starting-turn-yellow.html

See my forum link at bottom of page, scroll down on it and you will find a symptom chart followed by a detailed troubleshooting guide.

cheers for link, still kind of leaves 2 or 3 possibilities though, think im going to have to take a gamble and add more of one than another nutrient and play the waiting game

alot of the tims its over watering.... i have cut down 98% of my prob. i switched to weed barrier for pots i just my size and us a stapler to sow up the sides....

you think the brown spots and yellow leaves could be down to just over watering? mmm, could give that a go and when i water still give lots of nutes?

+ i think its quite hard to see but the leaves that are going a slight shade of light green/yellow have red stems....

magnesium def

try to keep your ph around 6.5, if needs be add some dolomite lime and that will keep it stable