Finally time for an update. I got a little busy towards the end of the summer and took a break from the tank. I have been able to put some time in on the tank the last few weeks.
I was finally able to install the skimmer for the tank. It is a Deltec AP702. I purchased it used about 4 months ago but the pumps were damaged in shipping. It took quite a while to get insurance money to repair the damage and then UPS decided to keep the pumps. Unfortunately the pumps were not insured enough to replace the pumps. Luckily I found someone that had a skimmer body damaged in shipping and I was able to purchase his used pumps.
<a href="http://www.flickr.com/photos/25155538@N02/2945350683/" title="2008-10-13_23-03-15_1657 by tluttmann, on Flickr"><img src="http://farm4.static.flickr.com/3024/2945350683_ef239cedf5.jpg" width="375" height="500" alt="2008-10-13_23-03-15_1657" /></a>
I am gravity feeding the skimmer from the overflow box.
<a href="http://www.flickr.com/photos/25155538@N02/2945351531/" title="2008-10-13_23-03-08_1658 by tluttmann, on Flickr"><img src="http://farm4.static.flickr.com/3043/2945351531_d6910c2499.jpg" width="375" height="500" alt="2008-10-13_23-03-08_1658" /></a>
Next, I decided that to make a change to the closed loop design. I originally installed two Barracuda pumps. One under each side of the tank. The pumps themselves are quiet, but when they both were running together they seemed to generate some resonance that was quite audible. I decided to remove one of the pumps and replace it with an Oceans Motions 4-way. I will also save on electricity and now I have a backup pump if one fails.
<a href="http://www.flickr.com/photos/25155538@N02/2945373303/" title="2008-10-14_23-35-18_1692 by tluttmann, on Flickr"><img src="http://farm4.static.flickr.com/3188/2945373303_c323fb9045.jpg" width="500" height="375" alt="2008-10-14_23-35-18_1692" /></a>
Now one pump would cycle between the two closed loops and I added two more returns in the back of the tank. I also added two Tunze 6100 hidden in the back pointing diagonally across the tank. I attached them to locline so that I could easily adjust them.
One return over the top through the eurobrace.
<a href="http://www.flickr.com/photos/25155538@N02/2945359133/" title="2008-10-13_22-58-15_1677 by tluttmann, on Flickr"><img src="http://farm4.static.flickr.com/3164/2945359133_b7b97c55d2.jpg" width="375" height="500" alt="2008-10-13_22-58-15_1677" /></a>
This used to be the intake for the second pump, now it is a return.
<a href="http://www.flickr.com/photos/25155538@N02/2945360179/" title="2008-10-13_22-58-14_1674 by tluttmann, on Flickr"><img src="http://farm4.static.flickr.com/3218/2945360179_6f963fb3ac.jpg" width="500" height="375" alt="2008-10-13_22-58-14_1674" /></a>
This diagram shows the order of the 4-way returns.
<a href="http://www.flickr.com/photos/25155538@N02/2946598784/" title="tank_dwg_rev3 by tluttmann, on Flickr"><img src="http://farm4.static.flickr.com/3172/2946598784_b5f40925a9.jpg" width="500" height="408" alt="tank_dwg_rev3" /></a>
Now, I am really happy with the flow.