Just so you know I have been into breeding fish and maintaining aquariums around town for fourteen years. I do have knowledge of fish and aquariums. Sure saltwater and freshwater are different. I have always had an interest in the saltwater kind. I have many books, magazines and look on many websites. So doing research I have done. But lots of books, websites and stores all have their own opinion. So that is why I asked people who do have these types of tanks. So don't think I am dumb and not knowledgable. That really frustrates me when people assume. You learn when you ask. So that is why I am. I appreciate all replies to my questions as alwalys. I just want to do my big tank right the first time. So even though a question may be stupid, when you read different things and are being told different things, well who better to ask then people who own these types of fish.