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Nm I get it. The left side of the tank is the algae area, and the drain and feed are on the side with the pump. The pump pushes the water under the baffle, and let's water return overnight the top.

I want to add a remote refugium to my 140 and this is much smaller and simpler than what I was planning. I believe I understand what you have done and can replicate it, but would be nice to see one put together where you could actually see it. I only wish I hadn't already purchased the LED fixture to use on the refugium. 
I'll do my best to get some more info on this sometime very soon.I'm building a new sump now using a 40 gallon breeder. I'm wondering if I could get the same spinning effect without separating the refugium and the sump? Something like this sketch. I think the concept of having the chaeto spinning is great. Making it spin in a sump might be just a mater of adding a piece of angled glass and a power head. Any thoughts?
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