If anything i say is close to right? Dude all i told you was that those spots were not mites, and they are not, that was a Mg or Ca Def or some contaminent in the water. Next you DO have a N def go to page 9 and you can clearly see that is not nute burn its either lack of light to lower leaves or lack of N. You have a cfl grow so you should be getting light to all leaves. Your red stems could be genetics i just suggested that you may need more P(cannabis hardly ever takes up excess amounts of P). And guess what causes all that PH being too low. Needing to transplant would act as a catalyst for this enviroment since the soil acted like a buffer for awhile. Dont worry though the new soil you transplanted in should be ph nuetral. So i recommend you get a ph meter (or make one out of red cabbage) and start testing the water and nutes you feed it. Baking soda for ph up and lemon juice for down (unless in hydro). And the 6 week thing just my own opinio, but from looking at your plants they look filled out just not fattened up, and thats the next step to maturity, the floral bracts form a false seed and swell. But i guess i should have said IMO. Anyhow great grow and good luck. Im out.