Ive kept TB's several times, never once had a problem with them or with them bothering any other fish, but Ive always kept them in large groups in large tank, 55g being the smallest tank Ive had them in, I personally dont consider a 30g tank large enough for them, because of their boisterousness and behaviour I feel they need the space to swim around, not only to give them space for their in fighting but to allow other fish the room to move away from them is they feel the need.







