i think those things are cool and all, but i dont really think they're built for saltwater. keeping the water warm enough would cause so much condensation on the table top that you wouldnt be able to see down into it. i'd say pick it up, since they tend to be pretty expensive, and either sell it or put freshies in it. saltwater is by far more attractive, but there are some cool things you could do with it in the fresh water realm.