Hello! I have built my first "real" tank. I had a 5 gallon with a plant and 2 guppies. My wife surprised me with Permission to get a 20. So that's exactly what I got. I currently have 3 black mollies, 4 gold dust mollies, 8 Ember Tetras, 1 pink tux Guppy, 2 female Fancy guppies and 1 Albino Cory...