I have two asian upside down catfish( both around 5 inches long), 1 Chineese algae eater(2.5 inches), 1 Plecostomus( newbie 1 incher), and 1 albino shark(4 to 4.5 inches long). I am considering getting some or 1 or 2 Cichlids, but don't want any problems with my asian cats or albino shark.