Ventilation in terrarium with computer fan?

[Fishkeeper]

That's really good to know about the L. astrophora. The spots where I think mine will look good and grow well all involve some water droplets getting on the plant. It dries before night, at least.

I'm trying for consistently high humidity, and for the background to be some reasonable degree of moist at all times. At the moment, it's cycling between "moist" and "slightly less moist". I have the sprayers running once in the morning for 15 seconds (which I think is a bit long), and then several other sprays of 3-5 seconds each. I might turn them all down somewhat, but I am trying to spray frequently.

That said, the goal is to hit the nicely moist circumstances that these plants like, with the minimum possible amount of actual spraying. Minimizes the water on the leaves of everything, which is particularly important given that I have a couple of begonias. One of them, the one right under the fan, is already pretty unhappy- I accidentally sprayed it directly while it was in a temporary holding box, without any active air movement, and a bunch of its leaves melted. Don't spray water directly on begonias that have no active air movement, they do not like it. That's part of why the fan is pointing downward, because I'm trying to keep it from getting melted any further. Once it's established and more robust against moisture, I might shift the fan a little, but right now I'm trying to protect this poor begonia.