As mentioned, my tank is overstocked. In this smallish set-up I have a total of twelve fish - six cichlids and six catfish. Don’t copy what I’ve done here, I’m only getting away with it as I’ll be offloading my fish in a few months and moving to a new project.
Instead, pick one of the following species and keep them as a pair, or a small shoal in the case of the catfish.
Neolamprologus pulcher: