I have a 55 gallon tank with 10 black skirt tetras, 4 very small firemouth cichlids(trying to get a pair), and a small male bristle nose pleco. I was wondering if I could add what I believe to be a school of 10 columbian tetras, they had them at my LFS, but I was just scanning and glanced at them and though they looked cool(but I forgot to check the name tag), from the research I have done I believe them to be columbian tetras. P.S. I have an Eheim 2075 and do weekly water changes.