Fish rent! Oh my goodness! XD
Update us with your water parameters, DormDrax!
I really want a colony of shrimp, too. They're so funny! I just worry that Mr. Fish will eat them and become a fatty. XD
You should probably wait until you're cycled before you get some shrimp or a snail, so ammonia doesn't build up faster.
I don't see why you shouldn't after that, though! I hope Drax doesn't eat them all. Hahahaha. Betta fatties :)