Since my 150dd cracked on the bottom a few weeks ago I picked up this system up to keep my corals and a few of my fish. I really enjoyed watching the process of my 150dd in a build thread so here goes with the build thread on this tank. Hope you guys enjoy! It has been a pretty fun build so far. Had to use my plumbing skills on this one since things are so tight and I really like how quiet a full siphon drain is. The return hole was 3/4" so I made that my main drain and the 1" hole for my emergency drain. I feel this is a better combination since if something were to fail on the main drain the 1 " would be better used to handle the water in case of emergency. Hope my thinking was correct. Then I just piped the return up and over the back of the tank, I was able to reuse the same one I used on the 150dd. When the 150dd failed on me I was able to all rock and some of the water so I am hoping I don't get much of a cycle. But I am sure I will get a mini cycle. Well here are some pics of progress so far. I need to get some closeups of the rock work and coral placement.