As mentioned, the hose alone will suck it up. Just don't get to close to the sand or it will come out too (there's where the practice comes in). And if you have small fish or shrimp, don't get it too close to them either. For thosewho hate snails as much as I do, it's also a great way to get rid of snails. Any time I do a water change, I use the hose only and any snails I see are immediately a target of the hose.