Originally Posted by shadetreeme
The only thing I would remind you about is to check how much water will come into your sump if the power goes out, and adjust your running water level accordingly.
I almost made that mistake!
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excellent point. that is in fact why I have a 30 gallon, the foam is sized for a 20L and if I have the sump filled to almost the top of the foam that gives me about 10 extra gallons to play with. I turn the pump off to test and I only get about five more gallons drain to the sump, so no risk of flooding.