It would help to know what medium you are growing in. The new growth doesn't look too bad, although the big fan leaves have been beaten up pretty well. The plant doesn't look well overall... what are you feeding, if anything? You might be a little weak on light as well, but that doesn't explain your issues currently. It looks like they could use a dose of 20-20-20 and maybe some magnesium, although that depends on the current PPM of the medium,, the runoff, and the Ph levels.