So, my kids and I are going to try and upgrade from our 90 gallon to a 180. we just love the hobby so much we cant get enough right now. Anyway, was lucky enough to find a local guy with a nice 180 with dual overflows. There is currently no plumbing. I was given 4 new bulk heads, 2x 1" and 2x 3/4 ". I also was given the original durso pipes as well as the original return pipes. Ive soaked everything in vinegar and the pipes are clean and im ready to move to my next step. So, i ran to home depot to get some adapters and start planning but hic-up number one. My bulkheads are not threaded all the way to the bottom of the 'bolt' therefore it will not screw into a female 1 1/4" pvc adapter to get going. So, anyone have a tip or link to the proper adapter or am i suppose to cut that non-threaded portion off? (that doesnt make sense). ANyway, the plan is to run the plumbing into a 48" long 50 Gallon tank. Was planning one area for my skimmer, one area for return and also was considering an area for a refugium. ( we are currently not running a refugium on my 90 gallon, so im unsure of this portion.) do you recommend a refugium portion in the sump tank? Anyway, please help me get this thing going! Step 1.....