Originally Posted by KreativJustin
Well, would drilling a hole in the top of the tube and use an aqua lifter like the CPR style does to help the siphon when the power goes back on from a power outage.
From the picture you posted, there is no need to break the siphon because when the power goes out, the main tank will only go down as far as the bottom of the slots at the top of the black box. If you break the siphon in the J tube, when the power goes back on, your tank will flood since the water has no place to go.
With the power off, the water level in the tank and the overflow will equalize so no water will be flowing. When the power goes back on, the flow will automatically start again.
What I was talking about was drilling a hole in the aquarium to be a direct overflow line so there would be no need for the Eshopps overflow box.