Experienced Shark owners I need some advice

[shy07guy]

First off I am doing research to see what it would take to keep sharks in a 1900gal pond. I have never tired keeping them so please do not flame me. I work at a LFS where we are thinking of turning our koi pond into a shark pond. The pond was originally set up to be this but do to time it was just easier to make it fresh water and put koi in it. Like I said the pond is 1900gal has at least a 15w UV sterilizer on it and about 4 feet tall by 2 foot diameter for some kind of skimmer. Pipes would be run on the bottem of the pond for flow but as to what the sharks like I not know whether it be turbulent or circular. I just wanted to get any advice or knowlegde from those who are keeping sharks.
Thanks in advance
Derek