Aqueon Siphon Vacuum Gravel CleanerThe Aqueon Siphon Vacuum Gravel Cleaner self primes with a simple up and down motion. This creates water flow which pulls debris away from the gravel at the bottom of your aquarium and removes dirty water from circulation, making regular cleaning and quick water changes simple. Self priming with up and down motion Efficiently separates debris from gravel Removes dirty water Perfect for quick water changes All Cleaners Include: 6' flexible hose, self