Okay, so I went to my local pet shop today and saw an absolute steal. A baby arowana for $20. I went on the internet and read they go for a whole lot more usually. My tank is 150 gallons and I plan on having also an oscar and severum cichlid in the tank. The pet store guy told me they wouldn't attack eachother, and that I believe. But I'm not SO sure about the fact that my tank size would be okay, as he said. I read I need bigger, and that sounds right, but I'm still not sure. I'd reaqlly like to get one if I could. What do you guys think?