Thanks Jim. I'm looking forward to getting together and seeing this thing up and running too.
Brad, it's definitly a lot of pipe. Other than the misuse of the overflow and the small pump this thing screams reef tank.
One thing that really scares me is the drain valve. I wanted a way to drain the tank quickly and easily. This gets the job done but it's a major weak link in the system. My daughter can turn that valve. With a little effort she could empty the tank in about 5 minutes. I'm looking for a way to lock the valve down. In the meantime, I'm going to run some 1 inch tubing off the barb and into my sink.
Another thing I'm trying out is the co2. I'm going to run it into the Iwaki. Hopefully this does the job without too much damage to the pump.