Why would you go with a closed loop system instead of in-tank powerheads or a WaveMaker?
I have a big honkin MDM pump with a 1/4 hp Baldor motor (thinking of selling it to someone needing a large return pump) that puts out 3600 gph (might be more) through 3 outlets in my 100g display tank, but barely moved stuff in my tank. I replaced it with a Coralife 5800 Wavemaker that produces a way more flow (no comparison, actually), and uses a fraction of the power. And no plumbing to set up. Also, you can adjust the flow to what is best for your corals.
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