they don't look like they are doin all that bad to me...do you have a meter? mine looked like that but seemed to perk up a bit when I upped the nutes

if I'm right they should be kinda stiff only other thing it could be is over nuting but if yer between 250 and 400ppm you should be fine

I'd say you can get your ph atleast down to 5.5 without any trouble and I keep mine even lower at times

how much food are ya adding?