Eheim battery-powered siphon

EHEIM Quick Vacpro - automatic gravel cleaner
The battery powered gravel cleaner enables you to clean the gravel substrate in your aquarium with ease, independently of your regular of water changes. The suction power of the cleaner is designed to remove dirt particles without too much disturbance to the gravel. A mesh filter compartment collects the dirt whilst letting the water flow back into the aquarium. The filter compartment is simple to remove.