Stick with juveniles and I promise you’ll be fine. You may see some fighting between them if they’re not already paired but that’s just to assert dominance for who’s becoming the female but nothing serious. At some point in time with almost any fish you get you’ll see some sort of territorial behavior but that’s all normal. For the most part it’ll never really be consistentYep! I'm pretty sure I will change my mind and that coming week! It's a woman's prerogative to do that you know haha!