My 40 and my sink faucet are about the same level, so I can only drain the top 20% with the water off, but the rest needs the water running. I like the idea of just hanging it out a window and "watering" with it though, especially since then it can be lower than the tank. I only wonder, is there a "method" to making sure your bell-thing isn't bashing all over the place, sucking up sand substrate while you're outside doing that part? Can't do buckets since I can only physically lift the small 2gal ones, but nothing heavier :[
I start the siphon with the faucet attachment and then disconnect the hose and put it in the bathtub or outside. It's way more efficient letting gravity do the work then trying to overcome it with a python.