We caught large numbers of elephant noses of various species in Gabon. They seemed to hang out alone (one per net) but in dense populations. When we were sharing our fishing spots with local people, we traded them for the fish we wanted. They make good soup, I was told.
They were in quick moving water but usually under overhanging stream vegetation. It's become a thing for old clothes from the west to be donated to poor countries, and it seemed a lot of that clothing became disposable to locals, and ended up in streams close to bridges, where we could access the water. Elephant noses seemed to like shirts and pants as habitats. Clothing snagged on rocks in fast water usually had one elephant nose that could be shaken out.
There's an aquascaping idea!
I got hold of some Microctenopoma congicum and ansorgii for one of my African stream tanks. I'm enjoying that. My Chromidotilapia nana dwarf cichlids went into a breeding tank, where they now have fry, and the gouramis got their spot in a 75. They're busy little options.