I'm thinking about converting my water barrel into a filter to replace my sump on my aquarium. I was curious if the siphon break rules are same or different with a water barrel. I would have a pipe going from barrel into tank for the outlet, when the pump shuts off, would that pipe be considered the siphon break? The barrel top would be above the aquarium and the pump would be inside the tank pumping water out and down into bottom of barrel. The water would rise up and flow out the top hole and into the tank via pipe.