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Old 09/17/2017, 04:27 PM   #97
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Join Date: Mar 2011
Location: Golden, CO
Posts: 340
I installed two Vectra M1's into the overflow box. They feed back up to independent sea-swirls. That's a modified closed loop. I have these set up obviously for the added flow, but also because these will be my go-to pumps

to transfer over in the event of a power outage. I didn't want a true closed loop because I didn't want the extra holes. These accomplish almost the same thing.

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