Okay so far there's some dominance issues but no one is bleeding or missing chunks yet. They're mostly just hanging out and once in a while one gets the urge to poke the other, but the mollie is too big to fit in the castle so that's Lulus retreat if she needs it. Even though the mollie is twice her size she wants to be boss of the tank and will flare at him. hmmm
There might be issues with the food since Lulu LOVES the flake food my friend gave me. I might have to separate her when it's time for him to eat.