How are you going to know their gender unless the pair you bought is a proven breeding pair? There is no way for us to determine their gender. If I were you, it is either a single angel or a group of 6 youngsters for a start? Both can work but for a 30g, a single angel will do. Buying two will not help matters as there is the possibility one will be constantly bullied and deprived its share of food.i mean i havent bought them yet. but should i buy m/m, m/f, or f/f
I do not see anything wrong with it. For a 30g, I'd keep one angel only unless Ara35 can find a breeding pair although a breeding pair will considerably limit her options to stock the 30g considering their nature when they spawn.Angelfish with rams in a 30 is iffy IMO.