Depends on what you mean by Banana Lily o_o
If its Nymphoides aquatica, "Big Floating Heart", then I have two, yez. I love these buggers.
They need the same care as other easy plants, nbd.
Dont bury the tubers (weird root things) or itll die and get gross. Bury one slightly if you want, or you can give it a day or two and itll send out roots/shoots and will begin to stick to the substrate (in calm water).
It likes up to 82'F, though if you can keep lower, Id stick to 78'F. Fertilize with liquid fertilizer, give it florescent light, and it'll be a happy nana. :B
They begin to get long after a week or so with good light, its cute. They grow towards the "sun", so decide which way you want the tubers to face beforehand, because they'' grow in about a day or two to that direction.
Other than that, theyre easy peasy :D I love them, Theyre so...derp.
Before and after about 2 weeks. Its even taller and more vibrant now. The lilypad things get bigger and bigger and look fantastic.