OK folks. I currently run a 120g and a 55g, both self contained barring HOB skimmers and refuges. I'm selling out on FW stuff, and more then likely getting a 125g RR tank(maybe bigger?). I will be using the 55g as a sump/refuge for the 125g, does this sound possible? I also have 40g breeder and 75g available for sump/fuge. I only want to run 1 tank under the DT. I would like this to contain the skimmer/DSB/ Cheato/ and LR if needed(heaters also). I need some input on designing my sump/fuge and plumbing it all together. No ATO's needed as I can do manually for now. Any links or help appreciated, as I've been FW for years, and reef for a while, but its just like FW to me in maintenence and start up. BTW, my SW tanks thrive, being self contained, but just want to try it the "other way".I will also be looking for help in return pump selection after the DT is purchased(skimmer and lighting I prolly have covered). Thanks for a bit of help.