Utricularia gibba is what would be referred to as an affixed aquatic meaning if you choose to try to grow this plant from CA Carnivores, you might want to try doing so in an opaque 3 gallon shallow container (I have used deep cat litter pans) with around 2" of wet sphagnum moss topped with another inch of very well rinsed sand. The layer of sand keeps the water clear. Fill with rain water/distilled water/RO water to only an inch or so over the sand. Gently stick the end of your plant into your medium. If you try to grow this plant in too deep of water or as an aquatic, it will never bloom. If you can add some pond water, great. Do not add mosquito dunks, the traps like the larvae. U. gibba is one of the easiest aquatic utrics to grow but they don't like algae.
At Sarracenia Northwest, they photographed what appears to me to be U. macrorhiza.
http://www.cobraplant.com/temperateplants/utricularia-vulgaris.html
They mention a random selection of utrics being sent out and all of those mentioned should work ok for you providing they aren't in fast moving water. All three are indigenous to the US and all three are suspended aquatics meaning they don't need to be "grounded" and will flower for you free floating. The suspended aquatic utrics are a little bit trickier to grow because they are finicky about water chemistry and can not compete with any algae.
All of the utrics mentioned above are temperate species. In the fall when the outer air temps begin to drop, they sink to the bottom of the ponds after having died back to small turions formed in late summer. In the spring they float back up and begin active growth. They need a dormancy or they will burn themselves out. If you don't have an artificial pond in which to grow utrics, you can bring their "home" into your unheated garage for a dormancy period.
Based on my experiences with fungus gnats, they damage terrestrial utrics particularly the smaller ones. I took care of fungus gnats with a product called Gnatrol which I think I bought online.