I had gyre on my nano. They have reverse if you want to run. I never did. The big benefit compared to other powerheads in the large swath of flow and updraw they produce. Having one anti sync on other end with some powerheads on back wall can produce a ton of turbulence.
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150 SC tank build: http://www.reefcentral.com/forums/showthread.php?t=2550948
Some have bar tabs. I have a coral tab at my LFS. Life goals.
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