My friend bought a N.Ventricosa recently (Of course, I had *nothing* to do with it...), it had an absolutely ridiculous amount of pitchers, 25 of them to be exact O.o!
But now he caled me and said many of them are blackening...
I did tell him everything he had to know about nepenthes, not to leave it in water, mist often and the like. *Since it was growing well in it's pot before and wasn't transplanted, it's not the soil, so when I asked him a few questions he told me he fed all of the pichers with some koi pellets I gave him. *Otherwise, he said he didn't seed any spot or pests in it.
....25 pitchers being fed at once... looks like an indigestion to me... *Am I correct?