There is a 150 gallon tank for sale on craigslist that I'm thinking about getting, and I have wanted a Jardini Arowana for several years, and I'm wondering if it's big enough. I'm a little worried, because I think it's a 4 foot tank, but it goes back pretty far, so I think that would make it easier for the arowana to turn around once it gets big. I haven't gotten the arowana yet, I'm just looking for a tank that will be big enough.