Leafs curling down

[lava]

I have some leafs curling down on all my plants. For leaves close the to light and leaves far from the light. I am thinking low humidity

temp 83 (with co2)
rh 45
uc res temp 69
ppm 500 (.5 ec conversion)

It is undercurrent with botanicare pbp. Plants are 10 days into flower on half grow, half bloom nutes. Roots all look great. I keep my temp at 69 for the beneficial tea.

-side not...sprayed with dutch master liquid light 3 days ago at bottle strength

 

[ENugs]

Its not humidity. If your at 45% then your good.

How's your PH looking?? And what growing medium are you in? When's the last time you flushed??

 

[lava]

ph is looking good, right around 6 after rising from 5.5
hydroton in 6" netcups
flushed the day before 12/12 (10 days ago) with clearex

Could it be drowning? I have 1 large airstone in each res, but it might not hit all the roots.

 

[ENugs]

Are you flood and drain, deep water, or something else?? Its really hard to drown or overwater in hydroton. Almost impossible.

It could also be in the plants genetics. I have a Super Lemon Haze that likes to do this, not matter what I do to it. I gave a cut to a friends and he's getting the curled leaves as well.

Have you ran this strain before?

And 500ppm sounds pretty low for plants in flowering. I would bring it up to at least 900 ppm.

 

[lava]

rdwc, i added a second air stone today in each res
i have not grown any of these genetics before so the slh could plan a roll
500ppm at .5 (or 700ppm at .7)
I took it up to 650ppm today and using budgoggles ppms as a guide