Hello aquarium keepers! My father and I are looking to fill a 20 gallon tank, and while he has been keeping aquariums my whole life, we have never had any angelfish, and this is the first tank I’m fully in charge of stocking. I am wondering if it is plausible to have two angelfish in a 20 gallon tank, or if it would be better to have only one, with tankmates. If so, what will go well in this setup? Thank you so much for the help!