I love my tigers, as do my children. They just love watching them swom around in their little school. My children even loved feeding them. They used to put their fingers in the tank to let the tigers nip at them. They thought it was funny. My Tigers are in a larger tank with Cichlids, and tetras. I tried to add some new small tigers, but they were devoured. I accidently dropped a Betta in the tank... instantly lunch! I would suggest a dozen small tigers with lots of decorations/obstacles to swim around. And go from there.