+1Thing about utricularia is, if you don't want it in your tank, be especially ruthless in pulling it. Otherwise, it will insinuate itself among your other plants and will become a real pain to eradicate.
I've used Utricularia graminifolia as a foreground plant in a nano tank, with great results. Forms a grassy carpet. U. gibba, on the other hand, is a nuisance.
Blaise