black water leaf's

i have an og kush on 8th week of flowering and the water leafs are turning black, what does this mean or is that a good thing., any help would be appreciated. thank you

Hej babe, 8th week is quite a way in so i would pick off the black leaves and check your feed strength just to ensure they arent too high...
Maybe flush with plain water for a week or so... The buds will be that little bit sweeter in a few weeks.
Good luck babes
Hej du
XXX

cool, took them leaves off, gave it ph water, looking good so far. thanks