Well, for me it turned out that the pots I were using were too small, and the water was evaporating too quickly. I had traps and roots growing down into the water on most of the plants, but they seemed to not be doing well at all. After the first few months of growing fine they took a steep decline. Then I decided to move them all into clay pots sitting in water with Azolla growing in it, and they exploded with growth! I grow Azolla in all the water trays I have. The Azolla releases excess nitrogen into the surrounding water. I can no longer look at the traps because they are now in peat, but the plants are now thriving. I think I remember reading someplace thant utrics like to spread out and do not like being root bound, so after I transplanted all my plants into 4 inch clay pots they exploded with growth and I have two flowering. Sandersonii, I think, and another yellow flowered one. Maybe if I get off my lazy behind and build the dispaly tank I have an idea for It might be large enough to make the utrics happy yet still have a way to display the traps. I will get back as soon as I make one.