Is a Hagen FLUVAL FX5 Canister Filter suitable for a 80 gallon saltwater FOWLR?

I use a canister in my 75 gallon as well. It has always turned my water over enough times an hour to sustain my tank. Just watch them though, you have to clean them constantly. They get murky real fast and can raise your nitrates. I would clean them every two to three weeks when you have to change out the carbon. Good luck:)