Just a thought, but most of the carnivorous plants are really sensitive to fertilizers, they tend to come from nutrient poor environments and can't handle much in that respect, so you'd probably have to be careful about ferts in the water, if you're intending on growing anything aquatic that needs them.
Personally I like the sundews, and pitchers -sarracenia and nepenthes both- better than venus fly traps, I think they're more interesting visually. Sarracenia have great weird looking flowers as a bonus, but many types need a cold dormancy period which might be difficult to accomplish for this situation.
Butterworts/Pinguicula are pretty charming I think, and they have nice flowers when they bloom.
I haven't grown any of these plants in 10+ years and I wasn't an expert even then, so I'm not an authority or anything, I just find them fascinating.