Thanks! I actually got some of my ideas from your sump design. I did get the fluval SP6, but I was concerned it wouldnt be enough flow with my single 1.5" drain and 1" emergency. Since the pump output is 1.25" I used an adapter to go 1.5" to a union, then to a wye. One line off the wye will go directly back to the tank, while the other will feed a manifold which will have ball valves for the following: refugium, chiller, spare, and calcium reactor. The only reason why I went with a seperate fuge was to maximize the refugium size without having such a large sump. The sump has a center bulkhead where the refugium will gravity feed back into. I made progress on the plumbing this past weekend, but after multiple trips to the fish store and multiple orders online I'm still waiting on some fittings to finalize the layout. I'll post pics of the plumbing soon.