Hungry Plants wrote: They are Nephorphyla and Calycifida. My Fulva, Livida, and Longifolia seem to be doing fine.
Um yes, I see that now. Hmmm, right there on the tags, imagine that. Perhaps it is time to get those new glasses after all...
Hungry Plants wrote:Humidity in the house is anywhere from 40-55 %.
I don't grow nephrophylla so I won't comment on that one but my calycifida likes things relatively dim and quite humid. I would raise the humidity as much as possible, and if you recently moved it more directly under the light, I would put it in a less intense spot. For the sandersonii it may just be time for a repot. Sniff the soil and if it smells like sulfur then I would suggest a repot in fresh media.