I am planning to add a sump to my tank. I pretty much know the scenario for when the power goes out. The overflow still sends water down the pipe to the sump and the sump's water level rises. When the power comes back on, the pump starts pumping the water from the sump to the tank and the water level in the sump goes down. What about the siphon in the overflow? That doesnt start up again and the sump still continues to pump water. What do must people do to resolve this? I heard that the CPR has a lift pump that can automatically start the siphon, but what about the people who use a U tube to create the siphon?