HELP!!!! hey guys got a problem here. I'm in the middle of the third week of flower and both my plants are showing the same thing. first things first.
600hps
4x4 tent
5 gallon smart pots
78 daytime temps
68/69 night time temps
ocean forest medium
fox farm trio nutes
6.7medium ph
so here's the deal. about five days ago I noticed the lower leaves starting to turn yellow and didn't think nothing of it, thought it would naturally do this. but every day it seemed to progress faster and faster. starts at the bottom of the plant and is working it's way up. the yellowing on the leaves start at the tips and fade in towards the stem. there are brown dots on the affected leaves but only on the veins. originally thought it was n lockout but checked the soil ph and it was fine. so then I thought it was nutrient lockout, I tested the runoff from watering and had a ppm of 125 ( I feed at 600ppm) so I think I have ruled out nutrient lockout. I'm stumped!!!! anyone have any ideas? pictures below.