I have an african cichlid, not sure what kind. It's blue w/black bars (about 7) that extend part-way up the dorsal fin, his size is about 2 inches long, no other spots or colors anywhere else. The tank is 10g w/rocks, coral, shells, and a couple of plants. Should I keep him alone? My lfs man says they are happier alone, but it seems to me there should be another. :girl: