well I got my tank up! Its in the corner and about 18in from the tv. It's angled and I am going to put fake plants or something behind it. I used 60 lbs of argonite and 20 lbs of live sand. Refugium is not hooked up yet. Have the circulator in there to help get things moving. Going to bring a sample of water to the LFS tomorrow and have them test it and probably picking up 30-40 lbs of live FIJI rock. I only have 48 lbs of rock in there now and 80 lbs of sand.
as for that piece. It is a protein skimmer. You can see it in this picture.