Edges curling up

[Automantic]

Leaf edges turning upwards, second week of
flower it seems to have started. Research point to light stress, I have raised the lights up to 20” @ 80%
power, but it seems to be spreading. I haven’t changed anything in the grow except change to bloom
on my nutes (GH Flora series @half strength,
R/O water with Cal/Mag. RDWC.
SF 1000 and Viparspectra P1000.
Super Autoflower , PH 5.8-6. EC 1.3

Any help is appreciated

[Bluey]

Hard to tell from the pics as the colours appear washed out but are you losing leaf pigment?

Into flower I up my pH a little to around 6.2.

What are your temps and humidity?

[Automantic]

Yes hello,
The light you see is actually a warm white
cfl as I have turned the leds off before the picture.
Daytime maybe 77 or so / night around 66
Trying to average 48% humidity.
The leaves are really on the darker side of the green spectrum.

[Gingerbeard]

Have you checked the roots?

[Automantic]

Yes always do because I’m in there checking
on things.

[Gingerbeard]

I'm not a RDWC. Your environment sounds good. My little research showed root rot as a possible problem.

[Automantic]

Thanks maybe tomorrow I will have a much closer look.