I have a 40b with a sump. In the past, I have been Using two pumps to pump form my display to my sump and back to the sump. I flooded my house 5 times. I am adding an overflow box to my set-up. Does my pump have to be the exact size (in gph) as my overflow? Or can the pump be 100gph if the overflow is 150gph? Also, does anyone have recommendations for a good cheap overflow and/or pump?
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