This suction pipe has an integrated pump so that you can easy suction dirt away the slim suction pipe has been optimised for the nano aquarium and is slim enough to get into every corner includes a practical tube holder so that you can affix the tube to a bucket the integrated flow control lets you regulate and stop the suction p dennerle nano gravel cleaner at a glance integrated pump for easy suction slim suction pipe ideal for aquariums with plants practical tube holder and flow control