Leaves fading and dying, started from bottom but spreading

Hello! Browsed Your diary and my reccomandation is : if You fertilize once a week (good practice in essence especially when dealing with chemicals and not after max yields), then You should up the potency to 2ml of each Growth/Bloom nutes for the next couple of weeks , then do only Bloom, same 2 ml or 3 if needed. Topmax and Calmag levels are ok, but please consider some Phosphorous aswell. Small increments week 8 through 10/11. And if You raise the lights 10 cm, Youre Golden !

Hello The symptoms you are describing sound like a defiency in nitrogen which can happen if you have recently switched to a bloom feed. Keep in mind N just like P and K are mobile nutrients they are in constant use by the plant and she will need nitrogen all the way up until the end granted she will need less and less but she does need it never the less. Hope this helps pal best of luck and happy growing :)

Full details in diary - water every 2 days, feeding once a week. Biobizz light mix soil and nutrient line. I have no proper pH meter, but have pHd water to 6.2-6.5 for each watering. Tried to pH soil by mixing some in distilled water, filtering and measuring 24h later but it appeared to be in normal range, however not sure how accurate this was. I've continued giving some CalMag since some brown spotting appeared 4 weeks ago. Plant looked healthier for a while, now about a week ago few bottom leaves started to die. I thought it was just the plant taking nutrients due to transition to flower, but it has received nutrients since and the issue is just spreading, today also showing some fade in few newer leaves higher up the plant. No clear signs of nute burn. Other 3 plants receiving same water and similar nutrient amounts are all healthy and problem free. I picked some of the dying leaves off in the last days, couple of them fell off on their own. Any ideas what could be going on here and what to do next?