I just purchased one of these a few days ago and I just used it today for the first time and my first thoughts were. " what a freakin waist of water!" I cant belive you have to leave your faucet running for you to be able to use it as a vacuum and it has to be turned on high for it to siphon the water from the tank out. Does anyone else have one of these? I wonder if petsmart will take it back. I got it because it said it used less water when cleaning however I dont see how..