There are also very few with interesting colors or patternings. Hence the lack of exports
you wouldn't say that if you ever saw adult colored-up Rayamas christyi.
there's a whole list of Opsaridium, Raiamas and Barilius species from Africa, not to mention true Barbus that are very good looking
also, Africa is home of THE brightest and colorful barb on the planet, I'm talking about this little guy:
not to mention beauties like Barbus holotaenia, Barbus hulstaerti, Barbus jae etc
I think it's more a severe case of tunnelvision: if it isn't a cichlid or a "monsterfish" it's not really interesting for export.
apart from Rift or Syno's, most non cichlids from Africa are in the last category; Polypterids, lungfish, baby specimen from huge catfish species, Goliath Tigerfish, Gymnarchus, Cornish Jack, Mormyrus longirostris etc etc
it is telling that it's har easier buying a Hepsetus odoe or Hydrocynus goliath than it is to buy Barbus holotaenia or Garra congoensis......
the export guys from Africa are stuck in a rut and they're stubborn enough not to change their ways.
back On Topic; mighty interesting little tank you got there; what temperature is that tank?
I think with a tiny Anabantoid in there (parosphromenus or so) the tank will be even better.....