So I am stepping up to a 55g. reef tank from a 30g. reef tank. I have been doing some research and figuring. My current setup is sumpless. I am going with the Aqueon ProFlex Model 2 sump with the Berlin setup and live rock. I guess I'll go with a HOB overflow box, Eshopps. I am also going to go with a Reef Octopus skimmer in sump. By the way, I only paid 75.00 for the tank itself and am going to build my own stand for it. I am def going to keep everyone posted in this build. As of now I have 0 knowledge on skimmers, sumps, overflow boxes, etc. I know the purpose and how they work but don't know "everything". So any comments as I begin this journey would be helpful.