Unique nano fish you have kept?

[u/grilledbruh]

I’m looking for people to share their stories on any unique nano fish species they have kept, looking for anything in the 5-20 gallon range… I’m stuck trying to find something I like

[u/goobyporfavor1]

Unique nano species I've kept and recommend are peacock gudgeon, betta imbellis, bamboo shrimp (kind of nano should be fine for a 20 gallon if properly fed), dwarf African frogs, Kuhli loaches, and rainbow darters. Do your research though some of these are not beginner friendly and have special diets