Fourth week and the hairy white pistils are turning yellow!

[jonez]

I'm growing hydro, using rock wool and have a tent...My plants are in the fourth week of flower...I've used aqua flakes a and b... A friend, who is a grower for many years, says that he doesn't ph his water...mine is high (ph) and I stuck with his advice.... now, the leaves are twisting upwards at the top, near the buds on a few of my plants and on some others I've noticed that the fuzzy white pistils are turning yellow! Should I worry?
I also have powdery mildew and placed a fan in the room, burned some matches but it didn't help...Is neem oil okay this late into flower???
Thanks for any suggestions.

 

[bobsdwc]

wow 382 veiws and know help kinda makes me wonder if this was a good idea joining this forum well friend i am new to growing and am thinking without having a calibrated ph tester i might just have the same problem at the tops of my plants but i have no powdry mildew a few of my pistils have turned sligtly amber only a select few on my small ass buds but tbf i am only four weeks in and hoe my babys fill out soon did u get this problem fixed or is still occurring

 

[Coke420]

hope this helps

 

[bobsdwc]

+rep

 

[Coke420]

Thanks for the reps!
As for the mildew what's the humidity in the room?