A little over 2 weeks ago I purchased a mystery nep (I suspect N. x ventrata). Keep in mind I have never attempted growing a nep in a window before, but I got out the light meter and found the best location for it and crossed my fingers. Things are not going so well. About a week in the older leaves and pitchers started turning brown, I thought it was just being grumpy because I moved it. The growth tips were still green and growing and a new, though much smaller pitcher had opened up. I trimmed back the browning growth as it progressed and kept an eye on it. Yesterday the same type of browning started on the new leaves.
Unfortunately I have forgotten more about the proper care and feeding of neps than I think I ever knew. To me this almost looks like cold damage, which is possible, my windows are not the best at insulation and we had a surprise freeze one night.
So, what is it and where do I go from here?