This Utricularia is sold mainly in the aquatics hobby as a carpeting plant in shrimp aquaria. I've been considering trying it as an emergent for quite a while and finally got around to ordering a portion. The portion that arrived was quite a surprise it's covered the top of a 3.5" square. Now all I have to do is settle it in and then try to get it to flower. At present it's a lovely shade of green.
The medium is peat and potting grit with the water level just above the medium.
Earlier this year I ordered a small section of U. gramminifolia for my aquarium (acidic, CO2 enriched), and couldn't resist sectioning off a bit to pot up in my greenhouse (as an emergent).
All trace of the aquarium bits eventually died off - it sort of bleached white and 'melted' away. The bit in the greenhouse also took a step backwards, but I'm happy to say it's still alive and doing ok....