new bichir

First hi, new to the community here. And well I just got the little guy two days ago from Petsmart after moving Koi and goldfish to a pond awhile ago and done a bit of research after wanting one of these guys for over a year but curious if small gravel for his tank is fine or if I have to change...

not sure if I spelled it right, but I think this is how my LFS spelled it. I was just wondering if anyone has kept a full size one and if so how big it got and how aggressive they are. one of the only things I've heard is that they haven't been in the hobby that long, I think since 2004. also if...