LionFish says......
You're definitely gonna want to get a 300 gallon tank. Although, hron sharks can live in smaller tank, I would recommend the 300. Especially if you are thinking about Bamboos. They're cool and if you have the space get the 300, you won't regret it. You always have to look at it from their point of view and personally, I dont think they would like to be cramped in a small tank. I mean, if they lived in the wild a couple of days ago, I doubt they would like a small tank. So, if you have the space and more importantly the money, get the 300 gallon. Also, welcome to the board. Hope ya like it.