Yes, However, there are many in the saltwater community that would disagree. Many believe that canister filters become “Nitrate Factories,” or they are “not good for saltwater” this is simply not true.
Canister filters are great mechanical filters, promote better flow, and also allow chemical filtration. To produce nitrates, you need nitrogen and ammonia, and since the ammonia and nitrogen are produced by fish waste and uneaten food, it’s merely a result of lazy keepers and not enough water changes.