Unhappy Plant

This is aeroponics girl. She's Barney's farm L.S.D. I'm growing her for the fun and not the smoke so I'm not too upset but I'm curious if you guys can help me figure out what's up with her.

I'm using Fox Farm Grow Big 3-2-6 and changing the res about every two weeks. I did change it every week to see if it would help improve her health but it didn't seem too. I've tried making the solution more diluted and that also didn't seem to help.

200w CFL above and 40w CFL desk lamp up close

Some of the leaves look like they're under heat stress which is possible since its a closet grow but I keep a fan on her when the door is closed and its open 16 hours a day.

Oh and its about a month and a half old and still in veg.

Looks pH related to me.

could be ph , when my plants look like that most of the times its either something to do with my temps or humidity. how often do u water/feed?

Looks like nute burn to me but then again Im on dial up and my resolution is turned way down to try and speed things up a little.

pH makes more sense but thats what I was afraid to hear. I don't have a meter and I don't really want to spend more money on it. I guess I'll just change the res more frequently.

I don't think its nute burn because when I first noticed it happening I immediately diluted the res with more water and it just kept getting worse. I was also careful to begin the res with 1/4 strength of the fert and I haven't increased that amount since.

I'm currently trying to lower my temps a bit to see if it will stop the leaves from getting all twisted at their tips.