I have been searching for this answer and it's nowhere to be found. First off I have a marineland 200 gallon deep dimension tank. I got it used and it didn't come with any of the plumbing. I winged it and made it myself. My idea makes it simple to start the flow. My concern is if the power goes out and the water stops siphoning. When the power comes back on and the pumps kick back on, it will run my sump empty and just burn out my pumps or start a fire under my tank. How do you get the siphon to start back up without being there physically? I might have to go with a drain style instead of a siphon pickup tube. I want to eliminate the gurgling sound of a drain though. Thanks for any help.