From those day 22 pics I really thinks its your lights being to close.
See a pic 1 and 2 below that I took on day 22 (1/23), before I changed lights. There are more brown tips in my pic than any of the ones you have. ALL FROM LIGHT TOO CLOSE
The 3rd pic was five days (1/2
later after moving the light up and away from her some, Can you see she got like a inch on her. Plus on this day is when started her on Fox Farm Big Grow and put the 3 cfls that are on her now.
So the last 3 pics are from today pretty amazing what she has done in two weeks huh?
I really think a. its your lighting b. you should start some nutes-I only used filter water and fox farm grow right now 1/2 teaspoon 1/2 gallon but thats based on my container size. Plus Im a firm believe that if you stick your finger in her and she's wet either give her a couple of hours if your on your normal routine and she if she dries on out or wait till the next morning on your watering.