Hi, new here. My daughter received a 20 gallon aquarium as a gift last July, 2010. She bought 5 angels - 1", 2 pictus catfish - 1.5", 2 blue dragon goby eels - 2 columbian sharks - 2" and 2 pleco - 1.75". I kept saying "too many fish" but who listens to dad, lol. A dominant male angel...