So I have been thinking about building my own protein skimmer and I figured I would put the design out here for critiques and criticism. The basic design come from a the reef Octopus models, instead of using acrylic tubes, I will be using 4" pvc. There will be a 2" pvc pressure union between the body of the skimmer and collection cup for cleaning purposes. The skimmer body will be roughly 20" in length. I will have to cut and mold a piece of acrylic to view the inside of the body so I can monitor what's going on. The total build should run me about 90 dollars which is about 1/3 of an actual reef octopus.... let me know what you think.