No, that's not big enough for your tank. Those ratings are for a completely different application than dinos. It should be plumbed from the tank back to the tank (not from the sump/return) with a dedicated pump, in your case pumping about 200-600 gph. I tend to try to hit in the middle...say 350-400 gph for you.
A picture of my UV and plumbing.
Very clean set up! What pump are you feeding your UV with?