So I have been thinking up ideas for a good Utricularia setup, and I read on some threads here that they generally appreciate a good amount of CO2 in the water. After some research I decided to make my own little CO2 pump. I connected an aquarium tube line through a hole in a one gallon milk container lid via superglue and silicone caulk. I then attached an air stone to the other end of the tube. By dissolving a few cups of sugar in water and adding yeast, CO2 is produced as a yeast fermentation by-product. Within hours of mixing it all up and putting the cap on tight I had a steady stream of bubbles going. All I'll have to do is switch out the soon to be alcohol water with new water containing sugar every few weeks. Has anyone else tried this?