The tank is now fully stocked. Met our new betta (my son hasn't named him yet). He seems to get along fine with the shrimp. One of the three seems to be missing but the other two hang out right next to the betta and he doesn't even give them a look. He spent the first few days in the back of the tank where the flow is lower flaring up at his reflection but now seems to be settled in and cruising the whole tank.