Leaves turning brown and curling up

[Smarty]

I could use some help diagnosing my sick plants. Leaf tips turn brown & then it travels to the rest of the leaf.
High pressure aeroponics with metal halides. PH is 5.9, water temp is 69, root chamber is 73, air temp is 83. I use Mills Nutes. I have added Cal Mag. Humidity is around 45%. Plants are 3rd week in Veg. Any thoughts would be appreciated

 

[UrbZ]

Check roots.. maybe rot.


Why so many posts?

 

[Smarty]

Roots are not as white as they should be, I added hydrogen peroxide last night to kill any fungus along with some hydroguard. I'm still not sure that is the problem, the roots were not mushy just not as white as I think they should be. The Mills nutes that I use may be staining them.
As for the multiple posts, the first two went to the main forum when I was trying to get it on the sick plants forum, which on my 3rd try I made it. Rookie mistakes.

 

[UrbZ]

I dont do hydro myself but if you could post a oic of your roots the hydro people would sure be able to tell you.

 

[Smarty]

good idea, thanks