you can buy an adapter for a waterbed changer at furniture stores. You can attach it to your faucet and it can suck water out and put it back in. it'll just cost you a garden hose and about $10 for the adapter. the problem is that the part that screws into the faucet is plastic, so eventually, you will have problems keeping the adapter on the faucet. I know there are pythons made for aquariums that have metal threading on them with a gravel vac at the end. Thats my next buy