I have kept them too, same care as any other tetra.The only fish I know of is the Blind Cave fish that was not that rare when I was younger lol.
I would go for a long, low tank ( a 10g would be fine anyway)with a pool filter sand substrate, cold water (increases oxygen) oak leaves to create blackwater,(they do come from swamps) a lot of plants/hiding places, and very little light. You should look at this thread as well, to convince you to run some kind of hydroponics for water quality.Okay I just found a lot more info on another thread(It wasn't an mfk thread). They live in virginia to georgia and everywhere east from there.They grow up to 2 inches will eat bloodworms, and are not very good swimmers at all. They need soft current in the water but like high oxygenation. Would an airstone work? There is very little personal experiences with them, but they don't need alot of room, although 99℅ of the time they die with tank mates. I don't know if there can be multiple of their kind in the same tank which would be nice to know. Mainly all I want know now is can they be fed frozen bloodworms (my black ghost knife could stand a diet), what would be a good way to add extra oxygen without flow, are they good with plants, how much tolerance for materials and minerals in the water such as plant fertilizer or freshwater salt, and last but not least any personal experiences. I know I probably won't get many answers but I will take any info I can get.
https://www.monsterfishkeepers.com/...ltration-why-not-popular-in-the-hobby.404668/
Here is a thread on another forum about someone setting up a tank for them.
http://forum.nanfa.org/index.php/topic/11123-swampfish/
Here is their Wikipedia article, that I assume you have read, from what you said in your post,
https://en.wikipedia.org/wiki/Chologaster_cornuta
Here is their Fishbase page, with some more info.
http://fishbase.org/summary/Chologaster-cornuta.html
(Thye pictures are not mine.)
I hope I got the right fish
If you can breed them, the females carry the egss in their gills, which is really cool.