ok guys I just finished building my 20 gal long sump and stand for my 30 gal. Now I want to buy the Danner Mag-Drive Supreme 3 350 GPH Water Pump and CPR CS50 Overflow Box rated for 300 GPH. Is that a good combination or do I need a better water pump. I'm new to this hobby and I do not even know what Im doing ;( . My sump is only going to be about 30 inch from the main tank. I want to build the pipes from PVC, any one know what size do I need and one more thing that is that close loop?