"I may be on the side of angels, but do not mistake me for one."
I'll +1 what Kris had to say about the ceph and it's sweet spot. The cephalotus I have been growing for almost ten years is a window lover. I tried under grow lights, under domes, etc, but it always did its best when I had it in a grow window on the south side of the house. Since my remodel job on the house, it lost it's south side grow window, so now it grows next to a window facing the east. It does well, but not as well as it did in that one grow window facing south.
My point is, they are tougher plants than what you might hear about when it comes to humidity, but at the same time, each plant has its own sweet spot in mind.
I've been growing Ceph's in high/mid/low humidity and if I had to pick one, I would go with the open air ones like this.
Growing Cephalotus follicularis on a Vertical Wall?
The high humidity ones seem to have a lower strike rate and are generally growing slower. Of course this is subjective and with a very small sample size but the results are no where close. The open air ones are just growing so much faster. They are of the same clone with most factors being equal expect humidity. Of course there are some differences.
All this is subjective and should be treated as such. Consistancy would be the key I would say.
For your conditions, the humidity dome probably isn't needed at all. However, depending on how long it has been in there, you should remove it very slowly (week or 3) to allow the plant to acclimate to it's new lower-humidity digs. One of the easier ways to croak a ceph (& many other plants) is to suddenly move it from high humidity to low humidity ...
All the best,
You must do the thing you think you cannot do. --- Eleanor Roosevelt
*** Growlist / Wants / Offers *** (with Pics)
From what I've seen...Cephalotus grow in very humid conditions in the wild. They either have water constantly flowing down its media (albeit slow) for those growing on cliff surfaces, or grow in open/sunny swamp areas near the base of much taller plants. They are not found growing in live/dead sphagnum moss.
In cultivation they would do better with slightly lower humidity. IMHO, keeping them in a dome can help them cope with fluctuating humidity levels but a constantly low humidity won't hurt at all if the plant is already acclimatised.