In this Article it says:
Canisters, hang on filters, trickle filters, and other highly aerated filtration types used in fresh water tanks, should NOT BE USED in marine tanks for biological filtration, although they can be used to hold carbon or similar. The reason is that nitrate reducing bacteria cannot function in a highly aerated environment, and use of these filters will result in a build up of nitrate to levels that are harmful to many reef dwelling creatures. In a marine tank use live rock to house the bacteria.
So live rock and a skimmer can suffice?