FINALLY FINALLY FINALLY! It's done. This is a 15 gallon acrylic tank with two bulkheads drilled and mounted in the back wall up near the top corners, I foamed the back wall and one side wall, and plumbed it to the main tank. It's fed with a Rio 1100 from the sump through a flex house and through one bulkhead. Then it overflows through the other bulkhead back into my sump via PVC pipe. Came out pretty good. In the picture where the display tank is seen, you can see one HUGE whitish rock in the left center...that rock is going in the refugium in the morning. It has been hanging out in my display getting some coraline and microstars. I am going to put a Mantis Shrimp in the refugium along with a variety of planted macros. More photos when I find a Mantis Shrimp! Enjoy, and ask questions if you have any.