I'm sorry to say that you need to scrub that girl and start over. Imo! I have a small auto but....that i dont think is worth saving. What were you watering with and how many cfl's?
over water and light to close
Too much water. Are you measuring PH levels? They might be really high or low. Do you know the temps? In a box or closet or somethin g??
Could just be bad genetics! I forgot i got one of these as a freebie this yr and it did alsmost the same thing. It grew about an inch over 2 wks with no new growth, then turned yellow so i yanked it. Shook it off as a dud! Barneys is kinda hit and miss from what i hear.
Next time try keeping between 5.8-6.2. Thats what i do and most others as well. Were you using nutes also? I dont feed mine with nutes until they start to show sex which is usually 3, 4 weeks.