I kept my two Uarus in an indoor pond with Pristella, Lemon, Emperor, Bleeding Heart, and Glolight tetras, hatchetfish, pencilfish, and other fish over several years. My Lemon and Emperor tetras even had fry that grew up to adulthood in there. It was great to sit by the pond and feed the Uarus by hand. They were so sweet. This was about 12 years ago in a Berkeley apartment--one of those molded ponds just sitting on the floor, with a sandstone waterfall for the canister return. I suppose they may have eaten a tetra or two, but mostly they just liked to hang out under an overhanging rock together. It would be nice to see them in more SA community tanks.