Hmmm...I don't know. I got the tank to house invertebrates only, but the stupid college changed its policy and banned everything but fish (yes, this means NO shrimp and snails - who knows why).
I've read that all otos are wild caught, probably using cyanide, and often die when acclimating to tanks. Also read that they are hard to feed if you run out of algae, as will happen in a tank this size, so I like them but dismissed them from consideration earlier.
Guppies are kind of pretty, but don't they just pace up and down the front of the aquarium all day? I'm not trying to argue all the time, but I'm confused. Apparently female guppies and cherry barbs grow to about the same size, but the barbs seem to be less active swimmers and are less likely to reproduce. Why is the one suitable for a small tank and not the other? And aren't even dwarf gouramis more of a bioload than a kuhli loach?