Just a heads up I guess. I am running the Tunze Nano and I had the line sitting in my return chamber below the water level and today while I was working on the tank, I heard water running on the ground and I guess that line went into a vacuum and my ATO reservoir started overflowing with tank water. I’m glad i was right there when it happened. I now have my line sitting above the water level. May be a rookie mistake but it’s not something I had thought about before.
