Bella is considered a dwarf hoya, but really easy plant and has nice flowers. I don't see why you couldn't grow roots or clippings in water with the right container. Make sure it gets enough light and that roots are dirt/pesticide free before introducing them to your tank. I have no idea how/if they would effect nitrate reduction like pothos, but it would look great once established.
Here's a link about their care, including a blurb about rooting clippings in water.
Good luck and pls post pics.
http://plantcaretoday.com/how-to-care-for-grow-and-bloom-hoya-plants.html
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