it's look like low Nitrogen to me. I used to have something like this so i put 29-10-10 fertilizer for a couple weeks, and move the light and bend some stems in order to make most of the leaves recieve the most light then it was gone.

I don't have any idea about the pH so im not sure but you may try my solution. i still have a few(just 1 or 2) of leaves like that.:rastasmoke:
anubeazh Reviewed by anubeazh on . some plant trouble ... i had an earlier post but i have been so busy i figured i would start a new one . heres some pics . i thought i had figured out my problem but i guess i didnt , my water was acidic and she was burning up . i used some lime to correct the PH in the water and have seen it getting worse in the past few days .... heres a few pics , i stoped all nutes for the past 4 days and flushed it well 2 days ago . browning is getting worse . the plant doesnt seem to have many leaves and the ones it does Rating: 5