[Brotherly Monkey]

When my tillys grow the flowers they bloom with no color and just seem to fall off and rot. Is this a lighting issue or moisture? I try to keep them from getting to wet.

they usually only last a day, if that. The color issue might be due to fertilization, though. Most of mine come out with a violet purple color

 

[Brotherly Monkey]

By no color do you mean pale, or green? I don't know any green flowered tillandsia (I don't know them all), except T. usenoides (spanish moss). Most are purple or blue. A nice red flowered one is T. albertiana.

I'd also suspect a nutrition issue, although if they are in a tank with frogs, it is hard to imagine what that could be. Usually more nutrition than most plants need in a frog tank.

Spanish moss is predominately yellow flowered, I believe

 

[Brotherly Monkey]

If the viv is completely sealed, via, a glass top, without some air flow, this might be a reason too.

I could see that leading to early rot, but no sure how it would effect actually flower color. Unless the actual bulb, or even spike, were being effected by some type of rot

 

[Brotherly Monkey]

Looks green to me when it blooms in the greenhouse. Maybe yellow-green, I guess.

after looking around online, it seems you're right. Though, someone sent me a variety that flowered yellow, with a large plant order.