Actually the plumbing looks difficult but it isn't, my best suggestion is to get PVC cutters. I finally did on this build because I was tired of cutting it by hand and not cutting it straight. I literally sketched out the plumbing on paper (I can't draw!) and that was good enough to show me what parts I would need. I could have very well went straight from the pump into the reefer return but I wanted to create better/more options for myself. Running it up and over allows me to push it back against the stand VS having it go straight up. Unions are a must, since I am using the soft tubing I may only use one union off of the 45 coming out of the pump.
I don't currently have a stock list, I built this system and the rock work with my main goal on coral. With that being said I started my first reef tank about a year ago, after a few months I tore the cube down that I built and sold it. I moved everything into a 20 gallon tank I built. The problem I had with the 27 gallon cube was the foot print, I know I want more fish just haven't put any thought into which ones yet!
https://www.reef2reef.com/threads/27-gallon-cube.207744/
https://www.reef2reef.com/threads/badfish-20-gallon-aio.254424/
I don't currently have a stock list, I built this system and the rock work with my main goal on coral. With that being said I started my first reef tank about a year ago, after a few months I tore the cube down that I built and sold it. I moved everything into a 20 gallon tank I built. The problem I had with the 27 gallon cube was the foot print, I know I want more fish just haven't put any thought into which ones yet!
https://www.reef2reef.com/threads/27-gallon-cube.207744/
https://www.reef2reef.com/threads/badfish-20-gallon-aio.254424/