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Hey, I saw this scimmer, and wonder if its a viable alternative, It seems like air is fed into the pump along with the water and then fed into the scimmer, once there the air rises, the water flows over and then out of the scimmer...It seems like a relatively simply design requiring only 1 pump to overate everything except the air. Could sit something like this in the sump and have it pump out to the refuge or back into the sump. And it looks real easy to build too.
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