So at first, I had trouble getting a vaccum started, but now I can. My tank is high up on my dresser, and my bucket is maybe 4 feet below it on the floor. If I try to start a vaccum, it always goes with gravity, so the water goes from my tank to the bucket, even when I'm trying to get new water in teh bucket to the tank. The only way to get water back into the tank is to hold the tank high up, but it is very heavy, so I had to put it on a chair, then add phonebooks, etc. How can I get this problem solved?