So here's the plan. Empty the 220, relocate fish to the 75 (remove baffles from the sump so they have room to swim. Build a wall in the dining room.. Construct a stand and a plywood tank (roughly 450 gallons) insert tank into wall.. I will be reinforcing the floors below the tank and making a 'Fish room' in the basement.. All plumbing will run through the floor to the basement.. I'm thinking about putting baffles in the 220 and using that for a sump and keeping the 75 (current sump) for a qt tank.. I also have a empty 40 breeder I can use for something if needed.. The space I have to work with is 10' wide. So I'll have a 2' door on the side of the tank to access behind it if needed. I'm planning on keeping some ray's and shark's mainly while keeping a handful of corals towards the top of the tank.. Sounds like a good time right? If someone could tell me how to post pictures that would be a good start. This is all in the planning stages right now as I have a pile of metal for the stand. I'm not sure about overflows or anything at this point.. I'd like to do a coast to coast internal I think?