slowly but surely. I am getting a few things from Charles (650-IS350). my wife wants to add a clam or 2 and we are going to add a few more fish; probably an anthias school at a minimum. I want to keep a good amount of free water space so the fish have plenty of swimming room and because it is a nice see through wall. as for corals, I like getting small frags and letting them grow into their spot so it looks as natural as possible. the system has proven itself as reliable and stable to support just about anything I add, so it its time to start getting into the more unusual corals.