papery, dry leaves

hey im on day 3 of flower, 400 hps. all my leaves on just one plant have a dry papery texture. the new growth is kinda odd too, very thin leaves, smallish, they feel like a lizards tail. didnt feel like that 6 hours ago. i waterd yesterday, 2ml grow, 3 ml bloom/1 gal h20. humbolt nutrients. organic. but i dont think its the nutes since its only happening to the one plant. my temps today ran around 81. with a RH of 29%, could this be why? maybe it got a little hot?

Alot of times the humidity gets realy high during the dark period? Idk?

81 certainly isn't high.....hows ventilation on each plant? That level of nutes should be a prob either....hope it recovers.

my ventilation isnt good at all. right now it is an open window with a fan sucking in the winter air, blowing it through another fan into my tent. before i was opening the window, my temps were steady 81-86., are you thinking its dried out? something like that? i havent really checked the temps when the light was off either. as the grow isnt at my home, should i check on it? the house stays a steady 75 so i know it isnt below that. thanks for answering you guys. + rep