Aquarium Fish Tank Gravel Siphon Cleaner 5 Sizes Designed specifically for easy cleaning of aquarium gravel, the simple priming action ensures the Betta gravel cleaner is quick and easy to use. Once the Betta syphon has been activated simply push the nozzle into the gravel, the siphon created will pick up the dirt and debris from within the gravel, suck this out of the tank whilst also carrying out a water change, and leave the gravel in the fish tank. Aquarium fish tank gravel siphon cleaner Can be used primarily for fish tank water changes Easy to use priming functionality Long hose length 120cm - can be used with most tank sizes Choose from... X-Small - Cleaning nozzle diameter: 2cm / Cleaning nozzle length: 27cm Small - Cleaning nozzle diameter: 8.5 x 3cm / Cleaning nozzle length: 18.5cm Medium - Cleaning nozzle diameter: 8.5 x 3cm / Cleaning nozzle length: 28.5cm Large - Cleaning nozzle diameter: 10.5 x 3.5cm / Cleaning nozzle length: 30cm To discover why it is important to syphon your aquarium gravel read our handy aquarium maintenance guide by clicking here.