Need your help to diagnose plant symptoms

[highletter]

Hi, all!
I have flowers in the middle of their 10th week (day 66). And most of the leaves showing signs of decay and spots just like something feeds on them. Also, it has black spots on the edges. I have a suspicion that it might be a root rot that infected my system on the second week of growing and now it came back. Even though I treated roots and it kinda helped to go through veggie and flowering up to this moment the disease appeared again.

Did anyone encountered this before in the flowering? Can I treat it somehow safe for buds?

 

[Grapefruitroop]

From here...
The white spot of the first pic looks like some bug damage....is it very widespread? if is just that leaf and thers no bugs i wouldnt worry...
The black of the second seems to me normal coloring of old leaves during late flowering...not a problem...

 

[Wh1teScorp1on]

Pure crop 1 you can use right up till harvest. It works as stimulant and as preventative for bugs and WPM. Not cheap
To be honest the colour change could be environmental or genetic. I don’t see anything that concerning yet