Clean gravel, siphon the fish and other debris by the filter mesh bag, then the clean water will permeate from the bag and into , also can drain out water through outlet pipeClean gravel, siphon the fish and other debris by the filter mesh bag, then the clean water will permeate from the bag and into , also can drain out water through outlet pipeClean gravel, siphon the fish and other debris by the filter mesh bag, then the clean water will permeate from the bag and into , also can drain out water through outlet pipeComes with a water inlet tube and two extension tubes, so user can adjust the height according to fish size or the water levelThe cleaning head with inner mesh reduces suction and prevents water plants or small fish from being sucked up with waterPowered by 2pcsTop handle part can be hung on the rim of fish , the cleaner helps to your hands and clean the effortlessly