EMS overflow vs Synergy Reef Shadow

[Mancuarist]

Thanks Simon, I checked out your build thread - terrific. I'm considering a basement fish room. I'm trying to learn, could I ask a few newbie questions?

- Did MM make you the 5 drain overflow or did you customize it yourself?
- What is the purpose of the closed loop? Is it just for flow? For UV?
- Do the ATS and Refugium not "outcompete" each other? Do both still grow algae?