Found together where I caught them, the Tetras and Catfish, in a 20 ft wide stream, anywhere from 3 to 5 ft deep, I figured it might work in a 180 gal tank.
What I did not consider was the nocturnal feeding habits of the catfish.
Above, the first day in the tank
Below, about 48 hours later.
Today (after starting with 3) this is the remaining live tetra.
I found another carcass in a corner, and have not found the 3rd.
I never saw any of of this predation activity, but each morning the tetras looked worse and worse.
Community tank cats?
I doubt this is gonna become a trend.