Severums will work with many tetra's. The tetra's must be kept in a decent sized school - much more then 4, and must be one of the larger, more robust size. It's also something reserved for species tanks and not cichlid communities.
Have you ever seen a large school of tetras cascade around a large, appropriate cichlid? It's a beautiful sight.
Have you ever seen a large school of tetras cascade around a large, appropriate cichlid? It's a beautiful sight.