Ok all you wonderfully knowledgeable people. Let's talk refugiums. Should I or shouldn't I? Since I'm not doing a sump with this tank, I would have to have a HOB refugium. Would it be worth it? If I do get one, it will have to be inexpensive (and I mean CHEAP!!!), because I have a problem spending big bucks on it until I know that I can be successful in the world of SW. I would rather spend my money on powerheads at this point. What are your thoughts?