Need some help as to what's going on w this plant? Leaves are turning kinda yellow towards bottom, excess or not enough nutes?

Hey there growmie what it looks like here is the starting touch of cal and mag deficiency. The reason this happens around this time is because we boost more P and K to the plant while in flower and we lower the light closer to the plant this makes the plant burn through its chlorophyll easier and because there is more P and K in the substrate it's harder for the plant to take up the magnesium and calcium it needs to defend its cells against the damage from the light so my advice straight up is just higher your light a couple inches not much and just add some cal mag after a light flush then add your nutes back slowly but surely but I'm sure your coming to end soon so I really wouldnt worry to much about it. I nice purple tho I grew one very recent checking out on my page I'm always available for any tips also. BATMAN_GROWS!!!