Glad you asked Josh, biorb aquariums are very poor choices for marine tanks. The curved glass is an ENORMOUS pain in the rear to keep clean and glass cleaning is a way of life in marine aquaria. Furthermore, their filtration systems are well designed to lead to the longterm buildup of nitrates which are more of a problem in marine systems than in our freshwater cousins. Hopefully you don't already have the tank, because I would strongly advise against it. Sorry to burst your bubble, but a standard square tank or one of the nano cube options are much more user-friendly