I think im past the drilling the hole and doing a internal overflow, I would probally need the over the edge overflowbox. Know of any place that would sell them, Can one of you smart tank guys give me a list of everything that I would need (Over the edge Diagram) for the Sump. to work on the tank.

I have 75 gallon fresh water that I have 2 eheim 2217's on and I Know alot about aquarium, but when it comes to this, I am completely baffled. I guess Im affraid of the water syphoning out of my tank and onto the floor, but Im sure that does not work like that.