The Aquarium Gravel Cleaner and Water Changer is a convenient and efficient tool for maintaining a clean and healthy fish tank. Safe and Efficient: Insert the nozzle into the water, bend down so that the drain is below the of the water, and just squeeze the priming ball 2~5 times, and the water automatically and continuously gush out! This method is very effective and poses no risk to , unlike other products that require strong suction with your mouth for a second to start cleaning dirt Adjustable Water Flow: Our hot tub vacuum comes with an adjustable water outlet valve so you can choose the water flow according to your needs, giving you more control over the cleaning process. You can also directly observe the entire suction process through the transparent hose Versatility: Handheld pool vacuums are suitable for a variety of situations, including spas, hot tubs, small above-ground pools, and more. Please note that it is not suitable for large swimming pools or drainage systems as