Lobster poses a sentiment that I am see with greater frequency on RC that values feeding the fuge from the return. I'm not convinced this is necessary, but people will use this method to suit their own individual needs.
I'm personally going to gravity feed my fuge from the main with a y to the skimmer compartment and a ball valve to the fuge. The Fuge will then Gravity feed to two points in the sump...half to the skimmer chamber and half to the fuge.
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7 Years Reefing and Many Fresh
8 Foot Envisions
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