Time for an update. I now have freshwater in the tank, and have tested the plumbing. All is well. The new Iwaki MD20RLXT I got is so silent, it is almost freaky. The only way you'd know its running is by touching it. My second Iwaki (older one) is the American model, and although it too is quiet, it can still be heard within about a 5' range. I've only hooked up the new MD pump so far. I also tested it on the kilowatt meter, and it draws only 33 watts when running.
I have setup my rock work in the tank, but I'm not sure if I'm going to keep it the way I have it or not just yet. I'm going to hook up my Tunzes, and add some sand to the bottom of the tank to see if I can place them in such a way that they're somewhat hidden, I get good flow, and can keep the sand on the bottom. Once I get it right, I'll post some pics. With this preliminary rock structure I've built, I'm only using about a third of the rock I got from TheOtherReefer. I'll most likely be selling off the rest of it once I'm satisfied with my tank.
Next is my calcium reactor. I stumbled on a great deal from James77 where I picked up a Coralife 500 reactor delivered for $55. He said he wasn't sure if it worked, but I wasn't planning on using it as is anyways. All I wanted to know was if it leaked. I doesn't, so I modded it out as you can see in the pics below:
I especially like the screw off lid and the fact that it holds a full gallon of ARM. I added a $60 Eheim 1048, and about $40 worth of pvc plumbing parts which include a 1/4" pvc needle valve which is not yet installed. US Plastics sent me a barbed valve when I ordered a 1/4" FNPT version. They are sending me a replacement which should be here by Monday. The needle valve will screw on nipple you see coming out of the top of the reactor lid. I have about $155 total into this reactor, and it will work every bit as good as most $400 units. The Eheim only draws 10 watts.