I have a stand and canopy for a 180 Gallon tank. Someday, hopefully soon; it will be set up. I'm doing much research now. So my question, I would like to have two dwarf angels in the tank. It seems to be a no-no having two dwarfs in a tank; but, if two can't live in 180 gallons...how do they even exist in the world? Don't really care about the world part, just my someday tank!