Why are people encouraging this? If you haven't kept a shark then you have no business in this thread giving "advice". The bio-load a shark produces is tremendous. To keep the shark happy and healthy, scratch that, ALIVE AT ALL you will need a protein skimmer. A tank that size you are looking at a multiple thousand dollar DELTEC, RK2, etc setup. That is just for the skimmer. You'll also need a heater/chiller unit, that will run you $1500~. You'll need some kind of custom over flow feeding into a sump (Acrylic $1500? Rigged? $100) and pumps powerful enough to at least turn your water over six times per hour, better ten times per hour. Oh and your pump(s) and skimmer will likely be 230v, pump(s) could vary well be 3 phase. Even if both are 1 phase you'll want both of them on their own circuits. That kind of electrical work you can't ghetto rig and will need to hire a professional to do.
I don't blame you for how misguided your endeavor is as you said you were new to the hobby. That said, anyone who is trying to help you, who has run _any_ kind marine tank before, is a moron.