Features: 1.Superior Performance: Aquarium air bubble stone quietly produces small dense bubbles, beautiful and generous, the tiny bubbles are uniform, rugged, low pressure drive (1.5W?3W air pump). 2.Easy Maintenance: Clean the stone once a month to prevent clogging. Soak it in water, gently brush its surface, and let it dry naturally in a cool and airy place. 3.Perfect Aquarium Fittings: Aquarium bubble stone aerator releases more bubbles and the gas is in more contact with the water surface. 4.Excellent Effects: Aquarium bubble stone aerator helps fish tanks or aquariums get a beautiful atomization effect. Small and compact size, it does not take up space. 5.Cautions: On first use, huge bubbles or uneven bubbles may occur, which is not a product issue. Just unplug the air tube, reconnect it, and repeat it a few times. Specification: Item Type: Aquarium Air Bubble Stone_x000D_ Material: Air Disc Stone PackageList: 1 x Suction Cup 1 x Check Valve 1 x Regulating Valve 1 x Aquarium Air Bubble Stone Note Please allow some error in manual measurement.