Utricularia is a carpeting plant that works well emersed or submersed. Once established, it will quickly spread to create a dense, bright-green, carpet. It is not uncommon to see some "melting" or die-off when this plant is first introduced, but be patient! The plant can regenerate from a single leaf and grow quickly once it is acclimated.
Difficulty: Medium, IME easy immersed but more difficult when submersed.