suck on the end of the hose thats what i do, all you have to do is suck just hard enough to get it to run over the top of the tank and gravity will do the rest
shame on python for designing something that wastes water to drain a fish tank..... as hobbyists u would think we would be a little more involved in water saving and whatnot. and a lot of us pay for the water thats going down the drain for no reason! use it to drain just like the old school siphons, and the sink to fill. its a siphon, not rocket science.