ok so what kind of overflow do you want calflo with holes drilled on back glass and a box going across top of tank? or you can drill holes on bottom and have a box built, to look like most factory reef ready tanks. I have a friend that can drill holes on bottom, uses a abrasives with the bit, so you get a very clean polished hole. looks better than diamond bits IMO. after that you need the right size bulkheads for the hole you drilled. best bet is to stop by one of our sponsors and have them help you, they will know and prob have everything you need.in the end you will thank me for saving you hassle and time.

as of now i would get all your plumbing plans done first and then worry about the rest later.