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- Feb 20, 2015
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Hi. I just got a used 120 gal last week with sump. The tank has dual overflows rated at 700 gph each. The return pump is only rated at 950 gph so instead of just upgrading the pump I bought one just like it so I'm running 2 950 gph pumps inline then splitting between each overflow. Has anybody else done this? How does it work for u? Will the pumps be fighting each other ran like this? I'm just wondering before I fill the tank this week...Thanks