My gut reaction is to try to disuade you from ever considering it, BUT if you are truly fascinated and dedicated to learning then I can't do that. There are people that very responsibly keep sharks in home aquaria. It CAN be done. It's expensive and not easy, but possible. The commonly available sharks in the hobby are the wrong ones to consider. I know nothing about it myself, but a friend of mine in the local club has kept sharks for years. Ignore anything heard at an LFS
, take each step one at a time (i.e. get FW
"down" first then research SW
), and have realistic goals measured in years.
Off-topic- yea, 3G- betta, no more and only if it's heated and filtered. If I read or remember wrong, I apologize.