After talking to many people I have finally decided on an aquarium. In the next few weeks I will be placing an order for an Advanced Acrylic 400 gallon aquarium with duel external overflows. The size will be 84" x 36" x 30". The aquarium will be in a fish room with only the front exposed. I want to try to discuss a topic per week and work through certain aspects of the tank with your input. I would like to start by discussing aquarium choice and how to get the best flow (ok that's two). As of right now I plan on using 2x DC return pumps (for redundancy, unsure on brand, opinions here?) each going to dual returns (flex line or sea swirls, opinions?). I was additionally thinking a closed loop or two with DC pumps again with possible sea swirls or ocean motions and/or the new Neptune WAV pumps vs VorTech MP40-60 vs gyre. I am trying to get this worked out now so I can order tank with the correct number of holes drilled. So fire away, and thanks in advance.