Tillandsias in tanks... The flowers don't last 1/4 as long as they do outside in the open. I assume it's more about the humidity than anything else. The flowers seems to wilt pretty quickly. On the other hand we had a few Ionantha hybrids in the store (just on the grow rack) flower and stay blooming for at least a full week!
One of our local breeding partners (working with cresties) has a few dozen Tillandsias in his house and in his vivariums, as well. His wife is the Tillandsia master!
All of the "house" Tillandsias are pupping like crazy, and it seems like there's always at least one or two flowering when I stop by. Here's a shot from a couple weeks ago. I think it's Tillandsia aeranthos, but you can see a Bulbosa behind it.
edit: to clarify - that's in his living room, not one of his vivariums.