This whole thread is very entertaining. Just a few points I would like to point out. You need at least 10X turn over rate for salt water, which means you will need 6700 GPH pump, and that's after head loss. Most if not all sharks need lots of room and very steady parameters. Which means no to an outdoor pond with changing temps, and water quality. Actually all salt water fish are highly sensitive compared to fresh water. And if your 13. and your job is playing Xbox, and taking care of fish I would consider a 10 gal with a damsel. Just to throw this out there for the cost, it cost me around $250 just to setup a 10 gal salt tank the right way. That is not including live stock. I'm not trying to discourage you from attempting salt water, but I would start out smaller if I were you.